Python Flatten List Of Strings

If the separator is nil , it uses current $,. Flatten a list/tuple and Call a function with tuples. Hi, I looked inside this thread for my query which brought me the following google search result "Test if list contains another list - comp. They are two examples of sequence data types (see Sequence Types — str, unicode, list, tuple, bytearray, buffer, xrange). Go to the editor Click me to see the. By using “”. Using the same method, you might also do this:. One of the essential purposes behind creating and maintaining data is to be able to search it later to locate specific bits of. No marble is on top of another. The game is limited to 2 dimensions—just X and Y positions. 3 Reading and parsing text using the Python csv module. You should be already familiar with the for loop which loops through each integer in the list and assigns it to the variable i. Using zip and not izip; keys(), values(), items() and not their iter- forms. com Mary, [email protected] Python Overview Python Built-in Functions Python String Methods Python List Methods Python Dictionary Methods Python Tuple Methods Python Set Methods Python File Methods Python Keywords Module Reference Random Module Requests Module Python How To Remove List Duplicates Reverse a String Python Examples Python Examples Python Exercises Python. join(list): It is a string method, and takes a list of things to join with the string. To create or edit an instance of this class, use NXOpen. One way is to iterate over the list until no lists remain:. If you are using numpy, you also can use flatten function to flatten an array. To create an element instance, use the Element constructor or the SubElement() factory function. I moves all the files of subdirectories to the top level directory. The strip() removes characters from both left and right based on the argument (a string specifying the set of characters to be removed). Recursion¶. Allows duplicate members. The bytes type in Python is immutable and stores a sequence of values ranging from 0-255 (8-bits). So you should know how they work and when to use them. Suppose we have a list of strings i. Built-In String Methods. list(a_list) print htmlcode It is easy to change it into a numbered (ordered) list: htmlcode = HTML. For the best answers, search on this site https://shorturl. But i would like to how this can be done in python: so i added this peace of code to my script: for sublist in aDistancesnew: for item in sublist: aFlatDistancesnew. The other option for creating your DataFrames from python is to include the data in a list structure. Write a piece of functioning code that will flatten an array of arbitrarily nested arra. the SMTP protocol. How to Reverse a List in Python By Dan Bader — Get free updates of new posts here. We all know that JSON (JavaScript Object Notation) is very useful for manipulating strings on client side with JavaScript, and its performance is very good over various browsers. How to use the len() method for getting string length?. GetFeatureClueHintMessages: Returns both clue and hint messages of the feature. ) Version for Python 3. Creating a Python function to manipulate python data types; Python Formated List; cant send this list from terminal to txt file/drop each index into new line; Remove commas in list replacing them with spaces; Breaking down a list in python; How to delete a list from a set? csv reader and list; Help Python List; Python List; list of dictionaries. To return an iterator, the izip() and imap() functions of itertools must be used. This tip show how you can take a list of lists and flatten it in one line using list comprehension. The string will contain a single word divided into syllables by hyphens, such as these: "ho-tel" "cat" "met-a-phor" "ter-min-a-tor" Your function should count the number of syllables and return it. The main advantage v3/latex has is the rich set of options for dealing with math and requesting various formats like mathml and asciimath. There is red, aquamarine, indigo. The split method is used to split the strings and store them in the list. x as well: Formatted Output in Python 2. Strings are sequences and can be accessed in the same ways as other sequence-based data types, through indexing and slicing. There is also an optional second clause that we can add that allows us to set how the list's index will increment between the indexes that we've set. It then calls the two Conversion methods defined later. python: how to flatten a nested list. There is a company that you can get traffic from and they let you try it for free. I moves all the files of subdirectories to the top level directory. » More on python flatten + It's also not very efficient in terms of memory use, since it creates a string copy of representation of the list, and a new list. Below you can find several of them: First one is based on collections. Hi, What if you need to count each elements' occurrences in list withount 'count()' and return a dictionary? You have a variety of choices how to do this. Returns a new array. This video tutorial breaks down Python list comprehensions for you step by step. The list contains an int, a bool, a string, and a float. This tip show how you can take a list of lists and flatten it in one line using list comprehension. Here the string "python" is transformed into an array of six Unicode characters. Whereas, if list is of strings then, it will sort them in alphabetical order. clear() Python: Get Number of Arguments of Function; Python: Copy Nested List, Shallow/Deep Copy; Python: Keyword Argument Default Value Unstable; Python: Append String in Loop; F CK Python: String Methods. In this post, we will talk about Python list functions and how to create, add elements, append, reverse, and many other Python list functions. If no argument is supplied, an empty list is returned. I have read a previous post on this forum with a similar problem. h` function:. We know that a list can contain multiple elements in it. The string is passed as an argument to a recursive function to reverse the string. A list can contain any Python type. if list is of numbers then by default they will be sorted in increasing order. This version of flatten avoids python's recursion limit (and thus works with arbitrarily deep, nested iterables). 6 Sequence Types indexing [n] data = [1,2,3,4,5] data[3] # return 4 concatenation + data =…. Hmm, I'm surprised by even that!. “The zero of lists. literal_eval() to get back to reality, as it were. The module ends with a series of small functions to write to be submitted for grading. Go to the editor Click me to see the sample solution. Strings are reducible to smaller parts—the component characters. Appending or prepending a value to a list in Python. In this lesson, you will work with the Python "csv" module that can read comma-delimited values and turn them into a Python list. Flatten a list of lists. Allows duplicate members. Recursively flatten each element that is a list. For example, the call count("ho-tel") should return 2. Returns a string created by converting each element of the array to a string, separated by the given separator. Given a 2D list, write a Python program to convert the given list into a flattened list. Unpickling – is the inverse operation, whereby a byte stream is converted back into an object hierarchy. How to join or concatenate two strings with specified separator; how to concatenate or join the two string columns of dataframe in python. Lists are especially important when you have more than one piece of data that are related in some form. It can contain various types of values. 72 KB Write a function to flatten a list. It works well for my use, but if there are things that can be improved then I would like to know. extend() or list. flatten(arr). For Loop The for loop that is used to iterate over elements of a sequence, it is often used when you have a piece of code which you want to repeat "n" number of time. Go to the editor Click me to see the. e no matter how many levels of nesting is there in python list, all the nested has to be removed in order to convert it to a single containing all the values of all the lists inside the outermost brackets but without any brackets. This tutorial will guide you through some of the common uses of formatters in Python, which can. In Python 3, izip() and imap() have been removed from itertools and replaced the zip() and map() built-ins. Set msg['To'] to a single string, but pass the raw list to sendmail: msg['To'] = ', '. 6 Sequence Types indexing [n] data = [1,2,3,4,5] data[3] # return 4 concatenation + data =…. Just like Hyperscript, the default entry point is the :func:`hyperpython. Flattening a Nested Sequence Credit: Luther Blissett Problem You have a sequence, such as a list, some of whose items may in turn be lists, and so on. (8 replies) I have a tuple of strings and a map from strings to either a string or a tuple of strings tuple of strings: x = ( 'John', 'Hunter', 'where' ) map: m = { 'where': ('was', 'here'), 'somekey': 'someval' } I want to be able to create a new tuple, which is the expanded and flattened version x, so that if an element of x is a key of m, then the new list has that value instead of the key. Today's tutorial is basically a bonus when it comes to Python basic constructs. Write a Python program to convert a list of characters into a string. (The Modula-3 system uses the term 'pickled' data for this concept. Use del to remove items from a list entirely. If no argument is supplied, an empty list is returned. The separator between elements is the string providing this method. One way is to iterate over the list until no lists remain:. FlatPatternBuilder. The Python string data type is a sequence made up of one or more individual characters consisting of letters, numbers, whitespace characters, or symbols. I have made these all solution worked with any typing. Python Numpy : Create a Numpy Array from list, tuple or list of lists using numpy. del list_name[index] removes an item from a list and shortens the list. Nested data¶ Before beginning to serialize data, it is important to identify or decide how the data should be structured during data serialization - flat or nested. Python Reference Python Overview Python Built-in Functions Python String Methods Python List Methods Python Dictionary Methods Python Tuple Methods Python Set Methods Python File Methods Python Keywords Module Reference Random Module Requests Module Python How To Remove List Duplicates Reverse a String Python Examples. But i would like to how this can be done in python: so i added this peace of code to my script: for sublist in aDistancesnew: for item in sublist: aFlatDistancesnew. coder on super() function in Python raises a TypeError;. A single list may contain numbers, strings, and anything else. 18 Most Common Python List Questions How to Convert A Python List To A String You convert a list to a string by using ''. json_normalize can be applied to the output of flatten_object to produce a python dataframe: flat = flatten_json(sample_object2) json_normalize(flat). In Python, you can call these methods from a string literal, so to concatenate list elements, for example, you can pass a list variable to a string literal's join method as in the following example:. flatten(arr) OR. We can use the "u" type code. The first line of the following code imports the library os, the second line stores the name of the current directory in a string called wd and the third outputs the contents of the directory in a list to the shell. You can provide any sequence or collection (such as a string, list, tuple, set, dictionary, etc). array() November 25, 2018 numpy. Some Python examples may deviate from idiomatic Python because they may be written to work in Python 3. im/gtodx A string of commands? Are you using the 'eval' function? Well being that it is a data type of type:string && being that the task needs to be done 20x && assuming the string is entered in by the user. Extract tuple from RDD to python list I have an RDD containing many tuple elements like this: (ID, [val1, val2, val3, valN]) How do I extract that second element from each tuple, process it to eliminate dupes and then recreate the RDD, only this time with the new 'uniques' in the 2nd psoition of each tuple?. How do you handle key collisions? Overwrites really don't make sense, because they are implementation dependent (at least before Python 3. The same can be applied as converting a string to float. List comprehensions offer a succinct way to create lists based on existing lists. Python Program to Reverse a String Using Recursion. if list is of numbers then by default they will be sorted in increasing order. All objects in the asteval interpreter are truly python objects, and all built-in data structures (strings, dictionaries, tuple, lists, numpy arrays), are supported. Python | Sort Flatten list of list The flattening of list of lists has been discussed earlier, but sometimes, in addition to flattening, it is also required to get the string in a sorted manner. You’re trying to do a Fold (higher-order function). concat(inflated_list). When using list comprehensions, lists can be built by leveraging any iterable, including strings and tuples. join(list): It is a string method, and takes a list of things to join with the string. It takes the original fp number, which is generally represented internally as an IEEE 754 floating point value, and converts it to an twos completment integer representing the floor of the value. If you are not familiar with Hyperscript, think of it as a pure Javascript alternative to JSX. In this tutorial, we will introduce you on how to flatten a multi-demensional python list. the above script generates a list of lists, offcourse it is simple flattened with list. By Xah Lee. line 129, in as_string g. path is a list type. New in version NX5. (8 replies) I have a tuple of strings and a map from strings to either a string or a tuple of strings tuple of strings: x = ( 'John', 'Hunter', 'where' ) map: m = { 'where': ('was', 'here'), 'somekey': 'someval' } I want to be able to create a new tuple, which is the expanded and flattened version x, so that if an element of x is a key of m, then the new list has that value instead of the key. Here the string "python" is transformed into an array of six Unicode characters. edu) # TODO We need the wireflat_iter. This post will describe the different kinds of loops in Python. Pre-trained models and datasets built by Google and the community. The built-in method returns. First, if it is a list of strings, you may simply use join this way: >>> mylist = ['spam', 'ham', 'eggs'] >>> print ', '. Given a binary tree, flatten it to a linked list in-place. Return a copy of the array data as a (nested) Python list. PHP assumes all strings have single byte characters. How to join or concatenate two strings with specified separator; how to concatenate or join the two string columns of dataframe in python. Python Exercises, Practice and Solution: Write a Python program to convert a list of characters into a string. An immutable sequence of characters. 24:55-convert a list of lists in to a flat list. 18 Most Common Python List Questions Discover how to create a list in Python, select list elements, the difference between append() and extend(), why to use NumPy and much more. A python dictionary is a list that is indexed by key values. Common Sequence Operations in Python Name Operator Example reference: Operations on Any Sequence in Python (interactivepython. In Python, strings are also immutable. Write a Python program to find the index of an item in a specified list. 0 also supported Python 2. Instead, in Python, one has to go through the trouble of writing a function for flattening arrays from scratch. In the example above, the list input is converted into strings output also with one horizontal white space as the "punctuation" (separator). As for the other part of your question, I'm not exactly sure how you want that data to show up in your CSV. h` function:. Data structures are a way of organizing and storing data so that they can be accessed and worked with efficiently. PHP assumes all strings have single byte characters. Create bitstrings from hex, octal, binary, files, formatted strings, bytes, integers and floats of different endiannesses. Tolist: We convert the array into a list with the tolist() method. Hyperpython allow us to generate, manipulate and query HTML documents using a small DSL embedded in Python. We can also accept a list of string as an input from user using the same way as we did for a list of integers. format() method of the string class allows you to do variable substitutions and value formatting. It works like this: " for all elements in a list, do this " Let's say that you have a list. Next: Write a Python program to print out all even numbers from a given numbers list in the same order and stop the printing if any numbers that come after 237 in the sequence. nb: list comprehensions are faster than for loops. In this article we will discuss how to remove characters from a string at specific index position or in a given range of indices. Let’s learn what list comprehensions are and how to identify when to use them. the above script generates a list of lists, offcourse it is simple flattened with list. Suppose you have a 2D list called mat, all you've to do is, crawl through the list elements and flatten the list by appending the list items one after the other. Jared likes to make things. In this Python tutorial, I will show you how to make a flat list out of list of lists in Python. List comprehension is powerful and must know the concept in Python. Sometimes you’re not sure about the nesting depth of your list, and you simply want. Still, there are important differences and missing features compared to Python. Python : Convert list of lists or nested list to flat list Convert First Letter of each word of a String to Upper Case in C++ Converting a String to Upper & Lower Case in C++ using STL & Boost Library. In the for loop append each number to the list. Flattens the input. Strings are an example of Python objects. The code recursively extracts values out of the object into a flattened dictionary. Sometimes you’re not sure about the nesting depth of your list, and you simply want. However, the Zen of Python says that "flat is better than nested", and, of course, we can express _g in a much flatter way by giving up the nesting, e. dom for parsing XML, and BeautifulSoup for parsing HTML. Extract tuple from RDD to python list I have an RDD containing many tuple elements like this: (ID, [val1, val2, val3, valN]) How do I extract that second element from each tuple, process it to eliminate dupes and then recreate the RDD, only this time with the new 'uniques' in the 2nd psoition of each tuple?. Flatten a list/tuple and Call a function with tuples. To create an element instance, use the Element constructor or the SubElement() factory function. Learn and conduct research on Python Django. Let's understand this with an example. It is used to split the given string and return a list of words. The separator between elements is the string providing this method. List of lists As a data scientist, you'll often be dealing with a lot of data, and it will make sense to group some of this data. You need to use NumPy library in order to create an array; If you have a list of lists then you can easily create 2D array from it. Python Collections (Arrays) There are four collection data types in the Python programming language: List is a collection which is ordered and changeable. The string will contain a single word divided into syllables by hyphens, such as these: "ho-tel" "cat" "met-a-phor" "ter-min-a-tor" Your function should count the number of syllables and return it. Write a piece of functioning code that will flatten an array of arbitrarily nested arra. There is also an optional second clause that we can add that allows us to set how the list's index will increment between the indexes that we've set. The flatten attribute describes a method. You'll learn how to access and extract portions of strings, and also become familiar with the methods that are available to manipulate and modify string data in Python 3. Given a binary tree, flatten it to a linked list in-place. Need help? Post your question and get tips & solutions from a community of 430,105 IT Pros & Developers. we can not modify the string objects. Go to the editor Click me to see the sample solution. It then calls the two Conversion methods defined later. Because python’s stack is going to blow up when the depth of the list is something ridiculously large. Python List Comprehension Tutorial Learn how to effectively use list comprehension in Python to create lists, to replace (nested) for loops and the map(), filter() and reduce() functions, ! When doing data science, you might find yourself wanting to read lists of lists, filtering column names, removing vowels from a list or flattening a matrix. It is available so that developers that use older versions of Python can use the latest features available in the json lib. If you used to do it like this: new_list = [] for i in old_list: if filter(i): new_list. Sometimes you need to flatten a list of lists. In Python source code, an f-string is a literal string, prefixed with 'f', which contains expressions inside braces. python: how to flatten a nested list. literal_eval() to get back to reality, as it were. This tutorial describes various ways to convert Python string to int and from an integer to string. You can simply use str method to convert float to String. Unlike strings that contain only characters, list and tuples can contain any type of. Sort a python list from high to low # Sorting and Altering original list # high to low z. This post will describe the different kinds of loops in Python. Strings are sequences and can be accessed in the same ways as other sequence-based data types, th. Flattens the input. join or concatenate string in pandas python - Join() function is used to join or concatenate two or more strings in pandas python with the specified separator. Recursion¶. 3 Reading and parsing text using the Python csv module. Read CSV and Process data as Dictionary or Lists and also Write or Export Dictionary data or List data to CSV in Python. As contents of both the strings were exactly same, so == operator returned True. List comprehensions offer smart way to create lists based on existing lists. 9 seconds for the > one creating a list at each level, and 3. Hi, I looked inside this thread for my query which brought me the following google search result "Test if list contains another list - comp. If you used to do it like this: new_list = [] for i in old_list: if filter(i): new_list. Suppose you have a large string you want to store in an array. Python list is a sequence of values, it can be any type, strings, numbers, floats, mixed content, or whatever. Now let's see how to compare strings in case insensitive manner,. Approach : Read input number asking for the length of the list using input() or raw_input(). I love Python, web development, machine learning and open source. Consider the string example: numberEx = '123. I think usual list are already quite flat (like 2D arrays, etc). In addition, Python’s built-in string classes support the sequence type methods described in the Sequence Types — str, unicode, list, tuple, bytearray, buffer, xrange section, and also the string-specific methods described in the. You will find lots of solutions on the Web to flatten a list of lists in Python. Just like Hyperscript, the default entry point is the :func:`hyperpython. This tutorial will guide you through some of the common uses of formatters in Python, which can. Allows duplicate members. Hey guys, im new here, Ive been learning python for the past month or two and have run into a bit of a problem. List comprehensions offer a succinct way to create lists based on existing lists. This is Recipe 10. The split method is used to split the strings and store them in the list. These store multiple units of data, called elements and unlike older programming arrays, Python lists will automatically adjust in size to accommodate new entries. The post will offer simple solutions, easy-to-follow and straightforward explanations and some tips and tricks that you can practice on the spot with the help of some. Return a copy of the array data as a (nested) Python list. String is a sequence of characters that exist as an object of the class. There is red, aquamarine, indigo. 72 KB Write a function to flatten a list. Given a binary tree, flatten it to a linked list in-place. It can read and write images in a variety of formats (over 200) including PNG, JPEG, GIF, HEIC, TIFF, DPX, EXR, WebP, Postscript, PDF, and SVG. This method returns a string, which is the concatenation of the strings in the sequence seq. Because python's stack is going to blow up when the depth of the list is something ridiculously large. Pre-trained models and datasets built by Google and the community. Using the same method, you might also do this:. It Sorts the elements of list in low to high order i. Such a version lets you flatten nested sequences with nesting levels higher than Python's recursion limit, which normally allows no more than a few thousand levels of recursion depth. You might have noticed that methods like insert, remove or sort that only modify the list have no return value printed - they return the default None. we can not modify the string objects. We started sinxLoud after becoming frustrated with the lack of support for beginners to get started with hosting their applications in the cloud and solving issues. List comprehension is powerful and must know the concept in Python. It is available so that developers that use older versions of Python can use the latest features available in the json lib. json_normalize can be applied to the output of flatten_object to produce a python dataframe: flat = flatten_json(sample_object2) json_normalize(flat). For example, Given. Contribute to luliyucoordinate/Leetcode development by creating an account on GitHub. Learn and conduct research on Python Django. By mkyong | June 3, 2015 Code snippets to show you how to convert string to bytes and vice versa. Still, there are important differences and missing features compared to Python. That's odd about the module not working. Flattens the input. This handles booleans, integers, strings, floats and lists, but doesn’t handle dictionaries yet. In the first form, if no arguments are sent, the new array will be empty. 24:55-convert a list of lists in to a flat list. Create 2D array from list in Python. im/gtodx A string of commands? Are you using the 'eval' function? Well being that it is a data type of type:string && being that the task needs to be done 20x && assuming the string is entered in by the user. extend() with an empty list and the spread function to flatten a list. TechBeamers Python How to Convert Python String to Int and Back to String. append('15') >>> L. This question was well answered on StackOverflow, see Making a flat list out of list of lists in Python. They are two examples of sequence data types (see Sequence Types — str, unicode, list, tuple, bytearray, buffer, xrange). I love Python, web development, machine learning and open source. This Python split string function accepts two arguments (optional). Need help? Post your question and get tips & solutions from a community of 430,105 IT Pros & Developers. The string is passed as an argument to a recursive function to reverse the string. L1=[[1,2],[3,4,5],[6,7,8,9]] flat=[] for i in L1: for j. Let me clarify something at the beginning, by array, you probably mean list in Python. Go to the editor Click me to see the sample solution. The flatten attribute describes a method. Recursively flatten each element that is a list. We saw that lists and strings have many common properties, such as indexing and slicing operations. Once a list has been created, elements can be added, deleted, shifted, and moved around at will. The loop way. Next: Write a Python program to print out all even numbers from a given numbers list in the same order and stop the printing if any numbers that come after 237 in the sequence. Common Sequence Operations in Python Name Operator Example reference: Operations on Any Sequence in Python (interactivepython. The string module contains a number of useful constants and classes, as well as some deprecated legacy functions that are also available as methods on strings. 15872, 115] LS = [str(i) for i in L] # change all elements to string type LS [‘10. Post the relevant bits here for us to see. About us; Django; Python; Download; Help; Sitemap. Note that while extend maintains the “flat” structure of the list, appending a list to a list makes the result two-dimensional - the last element in primes is a list, not an integer. How can I remove all NON alphabetic characters from my list of strings [PYTHON] FYI I do want to keep the commas between strings in the list. In this tutorial we will different type of conversion from list to string in Python. Unpickling – is the inverse operation, whereby a byte stream is converted back into an object hierarchy. F-strings provide a way to embed expressions inside string literals, using a minimal syntax. maxint): """ Flattens a nested list. To create a tuple, just list the values within parenthesis separated by commas. But i would like to how this can be done in python: so i added this peace of code to my script: for sublist in aDistancesnew: for item in sublist: aFlatDistancesnew. I moves all the files of subdirectories to the top level directory. Python Exercises, Practice and Solution: Write a Python program to flatten a shallow list. The following snippet reverses a string using the Python slicing operation. You’re trying to do a Fold (higher-order function). An immutable sequence of characters. How can I remove all NON alphabetic characters from my list of strings [PYTHON] FYI I do want to keep the commas between strings in the list. flat lists). The list contains other lists, strings, or ints. To return an iterator, the izip() and imap() functions of itertools must be used. Arrays are by far the most common data structures that could be used in any programming language. The first line of the following code imports the library os, the second line stores the name of the current directory in a string called wd and the third outputs the contents of the directory in a list to the shell. This post will describe the different kinds of loops in Python. Since Python is an evolving language, other sequence data types may be added. "In this guide, I'll walk through a few examples of how you can use list comprehensions be more expressive and simplify your code. list provides a member function sort(). array() November 25, 2018 numpy. User must enter a string. In this post, we will talk about Python list functions and how to create, add elements, append, reverse, and many other Python list functions. Python topics included in this module are print statement, arithmetic operators, input statement, combining of strings, if statement, while loop, and for loop. A dictionary is also collection of Python objects, just like a list, but one that is indexed by strings or numbers (not necessarily integers and not in any particular order) or even tuples! For example, suppose we want to make a. im/gtodx A string of commands? Are you using the 'eval' function? Well being that it is a data type of type:string && being that the task needs to be done 20x && assuming the string is entered in by the user. Flatten a List in Python - Recursive Approach. >>> def varpafu(*x): print(x). Strings are sequences and can be accessed in the same ways as other sequence-based data types, through indexing and slicing. This page lists features that Guido van Rossum himself has mentioned as goals for Python 3. Python has a function called dir that lists the methods available for. It might make sense to think of changing the characters in a string. Here’s what Seven Databases in Seven Weeks, a popular book on. To output formatted strings use template strings or the % operator described in the String Formatting Operations section. 2 for the one not creating the > list at each level. pop() parameter. Extract tuple from RDD to python list I have an RDD containing many tuple elements like this: (ID, [val1, val2, val3, valN]) How do I extract that second element from each tuple, process it to eliminate dupes and then recreate the RDD, only this time with the new 'uniques' in the 2nd psoition of each tuple?. This is a recipe to flatten a Python list which may have nested lists as items within it. The main technique for recursion removal is to keep an explicit last-in, first-out (LIFO) stack, which, in this case, we can implement with a list of iterators:. I can do that in a for loop, but maybe there is some cool "one-liner"? I tried it with reduce, but I get an. The first approach is to use a row oriented approach using pandas from_records.