In simple terms, the eval() function runs the python code (which is passed as an argument) within the program.
Warnings when using eval():
Consider a situation where you are using a Unix system (macOS, Linux etc) and you have imported the os module. The os module provides a portable way to use operating system functionalities like reading or writing to a file.
If you allow users to input a value using eval(input()), the user may issue commands to change file or even delete all the files using the command: os.system('rm -rf *').
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