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How-to articles, tricks, and solutions about PYTHON

I'm getting Key error in python

A KeyError in Python is raised when a dictionary key is not found in the dictionary.

python dictionary

Check if a word is in a string in Python

You can use the in keyword to check if a word is in a string in Python.

string python

ImportError: No module named matplotlib.pyplot

This error message occurs when the matplotlib.pyplot module is not installed or not imported properly in your Python environment.

python matplotlib

How to search for a string in text files?

Here's a Python code snippet that demonstrates how to search for a string in all text files in a directory:

python

Best way to strip punctuation from a string

One way to strip punctuation from a string is to use the str.translate() method in combination with the string.punctuation constant.

string python punctuation

Python int to binary string?

You can use the built-in bin() function to convert an integer to a binary string in Python.

python binary string.format

Dump a NumPy array into a csv file

Here's an example code snippet that demonstrates how to dump a NumPy array into a CSV file:

python arrays csv numpy

How do I do a case-insensitive string comparison?

You can convert both strings to lowercase or uppercase (using the lower() or upper() method) before doing the comparison.

python comparison case-insensitive

Constructing pandas DataFrame from values in variables gives ValueError

Here is an example code snippet that demonstrates the issue:

python pandas dataframe scalar

Is it possible to break a long line to multiple lines in Python?

Yes, it is possible to break a long line of code into multiple lines in Python.

python line-breaks