Split a string by "\r\n" in Python

Split a string by "\r\n" in Python #

Use the str.splitlines() method to split a string by \r\n, e.g. my_list = my_str.splitlines(). The splitlines method splits the string on each newline character and returns a list of the lines in the string.

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my_str = 'one\r\ntwo\r\nthree'

result = my_str.splitlines()

print(result)  # 👉️ ['one', 'two', 'three']

The str.splitlines method splits the string on newline characters and returns a list containing the lines in the string.

The method does not include the line breaks, unless the keepends argument is set to True.

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my_str = 'one\r\ntwo\r\nthree'

result = my_str.splitlines()

print(result)  # 👉️ ['one', 'two', 'three']

# 👇️ ['one\r\n', 'two\r\n', 'three']
print(my_str.splitlines(True))

The str.splitlines method splits on various line boundaries, e.g. \n, \r, \r\n, etc.

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my_str = 'one\rtwo\r\nthree\n'

result = my_str.splitlines()

print(result)  # 👉️ ['one', 'two', 'three']

If the string ends with a newline character, the splitlines() method removes it, as opposed to the str.split() method.

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my_str = 'one\r\ntwo\r\nthree\r\n'

result = my_str.splitlines()

print(result)  # 👉️ ['one', 'two', 'three']

# # 👇️ ['one', 'two', 'three', '']
print(my_str.split('\r\n'))

If there is whitespace between the text and the newline characters, use the str.strip() method to remove it.

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my_str = 'one  \r\ntwo  \r\nthree   \r\n'

my_list = [line.strip() for line in my_str.splitlines()]

print(my_list) # 👉️ ['one', 'two', 'three']

We used a list comprehension. List comprehensions are used to perform some operation for every element, or select a subset of elements that meet a condition.

If you get empty strings in the result and want to filter them out, use the filter() function.

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my_str = '\r\none\r\ntwo\r\nthree\r\n'

my_list = list(filter(None, my_str.splitlines()))

print(my_list)  # 👉️ ['one', 'two', 'three']

The filter function takes a function and an iterable as arguments and constructs an iterator from the elements of the iterable for which the function returns a truthy value.

All values that are not truthy are considered falsy. The falsy values in Python are:

• constants defined to be falsy: None and False.
• 0 (zero) of any numeric type
• empty sequences and collections: "" (empty string), () (empty tuple), [] (empty list), {} (empty dictionary), set() (empty set), range(0) (empty range).

Note that the filter() function returns a filter object (not a list). If you need to convert the object to a list, pass it to the list() class.