[ SRE_ARENA ]
← BACK TO ROADMAP
MODULES, MATH & DATES

Standing on the Shoulders of Giants.

Implementation Code: 1. Modules & Imports
PYTHON
# mymodule.py (Saved on disk)
def greeting(name):
    print("Hello, " + name)

person1 = {"name": "John", "age": 36}

# main.py (In the same folder)
import mymodule

mymodule.greeting("Jonathan")
print(mymodule.person1["age"])

# You can alias the import
import mymodule as mx
print(mx.person1["name"])
DOWNLOADING CONCEPT: 1. MODULES & IMPORTS...
  • ↳Consider a module to be the same as a code library.
  • ↳A file containing a set of functions you want to include in your application.
  • ↳You can use the import statement to pull in a module.
  • ↳You can also rename it using the as keyword (import pandas as pd).
  • ↳If you only need one specific function from a massive module, use the from keyword.
  • ↳This saves memory and keeps your namespace clean.
▲ LIVE INCIDENTYou need to parse a JSON string received from an API.
sre@arena:~/python-modules
sre@arena:~$ python -c "import json; x = '{ \"name\":\"John\" }'; y = json.loads(x); print(y['name'])"