#3 How to Import and Install Using Python | Python Course From Zero To Hero.

Day 3 - Modules and pip in Python!

Module is like a code library which can be used to borrow code written by somebody else in our python program.
There are two types of modules in python:

1) Built in Modules - These modules are ready to import and use and ships with the python interpreter.
there is no need to install such modules explicitly.

2) External Modules - These modules are imported from a third party file or can be installed using a package manager like pip or conda.
Since this code is written by someone else, we can install different versions of a same module with time.

The pip command

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pip install pandas

It can be used as a package manager pip to install a python module.
Lets install a module called pandas using the following command

Using a module in Python (Usage)

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import pandas
# Read and work with a file named 'words.csv'
df = pandas.read_csv('words.csv')
print(df) # This will display first few rows from the words.csv file

We use the import syntax to import a module in Python. Here is an example code:

Similarly we can install other modules and look into their documentations for usage instructions.
We will find ourselved doing this often in the later part of this course

The Main.Py

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import pandas  # This is an example of external module
import hashlib  # This is an example of built in module

print("Hi")

# Dont worry about how to use these modules just yet!
pandas.read_csv("one.csv")
m = hashlib.sha256()