Letâs now review a simple use case, where weâll have a list with strings. Use Case: Why Convert Strings to Integers? Youâll get the same results as the first approach: The strings will be converted to integers: Īs before, you may apply the syntax below in order to verify that the strings were converted to integers: my_list = The syntax of the method, int in python is very simple: int(value, base) The value parameter is required but the base parameter is optional. The int () method takes a string or integer data type and converts the given data into an integer number. Using List Comprehension to Convert Strings to Integers in a Python ListĪlternatively, you may use the second approach to convert your strings to integers: my_list = įor our example: my_list = We can convert string to int using the Pythons built-in method called the int () method. string '15' num int(string) print(type(num)) In the above example, we are evaluating the type of data the string has been converted to using the type () function.The portion in yellow represents the strings prior to the conversion, while the portion in green represents the integers following the conversion: To convert a numerical string to an integer use the int () function, passing the string to convert inside the () (parenthesis) of the function. Optionally, you may perform a further check to verify that the strings were converted to integers: my_list = The following code uses the astype () method from the NumPy library to convert a string to decimal in Python. Once you run the code, youâll see the list of integers (without any quotes around the values): Use the astype () Method From the NumPy Library to Convert a String to Decimal in Python The NumPy library contains an in-built astype () method that assists in converting the data type of the given NumPy array. You can then use map in order to convert the strings to integers: my_list = You can use the float() function to convert any data type into a floating-point number. Here is how the list with the strings would look like: Below are 6 common and simple methods used to convert a string to float in python. Suppose that you have a list that contains 5 values, where each value is stored as a string (by placing each value within quotes): my_list = Using Map to Convert Strings to Integers in a Python List You may apply either of the two approaches below in order to convert strings to integers in a Python list:
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