Python cheatsheet

Python cheatsheet

## Python datatypes:
get a datatype: `type(object)`
get id of object: `id(object)`

### immutable:
int:   42
float: 4,2
str:   "hello world"
bool:  True/False
tuple: ("hello","world")

### mutable:
list: ["hello","world"]
dict: {1:hello,2:world}
set:  {1,2,3}


## test for exceptions

Try:
  action to test
except:
  executed if error happen. Real errors, not if condition is false 
---
Try:
  action to test
except exception_type as returned_exeption: # used to catch only this error and print it
  print("Error is :", returned_exeption)
else:
  do something  
---
try:
  assert test = value #test a condition and create an "AssertionError" if False
except AssertionError
  pass
finally:
  This will always be executed at end of try
---
try:
  if condition:
    raise Type_of_error("exception_description")
except ValueError:
  do something