python transform list of string into list of list code example

Example 1: python convert list of lists to list of strings

# Basix syntax:
['delim'.join([str(elem) for elem in sublist]) for sublist in my_list]
# Where delim is the delimiter that will separate the elements of the
#	nested lists when they are flattened to a list of strings

# Note, this uses two "levels" of list comprehension

# Example usage 1:
my_list = [[1, '1', 1], [2,'2',2], [3,'3',3]]
[' '.join([str(elem) for elem in sublist]) for sublist in my_list]
--> ['1 1 1', '2 2 2', '3 3 3'] # List of space-delimited strings

# Example usage 2:
my_list = [[1, '1', 1], [2,'2',2], [3,'3',3]]
['_'.join([str(elem) for elem in sublist]) for sublist in my_list]
--> ['1_1_1', '2_2_2', '3_3_3'] # List of underscore-delimited strings

Example 2: python convert list to list of strings

# Basic syntax using list comprehension:
lsit_of_strings = [str(i) for i in your_list]

# Example usage:
your_list = ['strings', 'and', 'numbers', 11, 23, 42]
lsit_of_strings = [str(i) for i in your_list]
print(lsit_of_strings)
--> ['strings', 'and', 'numbers', '11', '23', '42'] # List of strings

Example 3: convert list of list to list python

merged = list(itertools.chain.from_iterable(list2d))