How do I convert a list of strings to floats in Python?

Converting Strings to Floats in a List

You have a list of decimal numbers stored as strings and wish to convert them to floats. The following methods will guide you in achieving this conversion:

Using a List Comprehension:

The most concise and Pythonic way to convert each string to a float is using a list comprehension:

<code class="python">my_list = [float(i) for i in my_list]</code>

This creates a new list where each element is the float equivalent of the corresponding string in the original list.

Using the 'map' Function:

You can also utilize the map function to apply the float conversion to each element:

<code class="python">my_list = list(map(float, my_list))</code>

The map function takes a function and an iterable as arguments, and it returns a map object. Converting the map object to a list gives you the desired transformed list.

Using a For Loop:

Although not as concise as the previous methods, you can use a for loop:

<code class="python">for i in range(len(my_list)):
    my_list[i] = float(my_list[i])</code>

This method modifies the original list in-place.

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