Python Tips

Have you ever wished to write a Python decorator with only one function instead of nested functions? If so, try decorator.
In the code above, time_func and time_func_with_decorator produce the exact same results except that time_func_with_decorator is easier and short to write.
Check out other things the decorator library can do.
Link to the source code.

If you are like me who frequently use Python shell as a calculator, you can grab the last output by using _. This trick works in Jupyter Notebook as well.

If you want to run the code in a file by running the parent directory, simply rename that file to __main__.py.
In the code above, $python salutation gives the same output as $ python saluation/__main__.py.
Find a full example of this in my article: 3 Techniques to Effortlessly Import and Execute Python Modules.
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If you want to turn a string into a function or variable, use eval. In the code above, I turn the string variable_1 to a variable.
eval is especially handy when you don’t want to hardcode the names of your variables or functions.
For example, you can use eval and list comprehension like above to combine all values of different variables into a list.
Link to the source code.

Have you ever felt annoyed by the warnings every time you run a specific piece of code? If so, use the warnings module. By inserting the code above at the beginning of your script, warnings will not show up in the outputs of your script.

If you want to either replace one string with another string or to change the order of characters in a string, use re.sub.
re.sub allows you to use a regular expression to specify the pattern of the string you want to swap.
In the code above, I replace 3/7/2021 with Sunday and replace 3/7/2021 with 2021/3/7.
Link to the source code.

Provided an event starts at a certain time and takes a certain number of minutes to finish, how do you determine when it ends?
Taking the sum of datetime and timedelta(minutes) as shown above will do the trick.
#python

If you need a small class to manage data in your project, consider using namedtuple.
namedtuple object is like a tuple but can be used as a normal Python class.
In the code above, I use namedtuple to create a Person object with attributes name and gender. Just like Python class,  you can access attributes of namedtuple using obj.attr.

Apply max on a Python dictionary will give you the largest key, not the key with the largest value. If you want to find the key with the largest value, specify that using the key parameter in the max method.

If you want to associate elements from two iterators based on the order, combine list and zip. Above is an example.
Link to the source code.