Sep 17, 2021 · Simple function to accomplish this: def insert_str(string, str_to_insert, index): return string[:index] + str_to_insert + string[index:]

Feb 1, 2018 · So I would like to take a list like: [1, 2, 3, 4] and then add an item right before the one in position "i". For example, if i = 2 the list would become: [1, 2, "desired number", 3, 4] How could I do that in python? Thanks ahead.

Under Python 3.6 you can use f-strings in lieu of concatenation to save a few additional CPU cycles when the number of substitutions is fixed (e.g., f' {source_str [:pos]} {insert_str} {source_str [pos:]}').

May 12, 2023 · Add the phrase in the middle of the string using list slicing, and join the resulting list back into a string using the join () method. Alternatively, use an f-string to concatenate the parts of the string, or use regular expressions to replace …

Aug 12, 2024 · List insert () method in Python is very useful to insert an element in a list. What makes it different from append () is that the list insert () function can add the value at any position in a list, whereas the append function is limited to adding values at the end.

Dec 18, 2023 · To add a substring using str.format() in Python, use curly braces {} as placeholders within the string. Insert the desired substring or variable inside the curly braces, and then use the format() method to replace the placeholders with the specified values.

May 6, 2024 · To accomplish this, you can use the Python insert () method, which helps you add the string to the list at a specified position based on the index. The syntax is given below for how to use the insert () method.

Jan 7, 2025 · Learn how to use the `insert ()` function in Python to add elements at specific positions in a list. This guide includes syntax, examples, and practical use cases

May 30, 2024 · This article explained how to add or append a string at the end of a Python list, add a string at a specific index in a list, and add multiple strings from the list at the end.

To insert a string at specific position within another string, you can use slicing and concatenation. For example, if x is the original string, and you would like to insert y string at i position in the original string, then you can use the following expression.