Wat is the difference between if [variable] : and if [variable] == True :

Answer 1

This is what the python PEP8 style guide is saying about how to compare to bool:

# Correct:
if greeting:
   ...

# Wrong:
if greeting == True:
   ...

Worse:
# Wrong:
if greeting is True:
...

Answer 2

When variable is a numeric datatype there shouldn't be any practical difference.

But when variable is for example a list or a string, then [variable] == True would never result in True.

if variable is a list, then if [variable] is based on whether the list is empty or not.

Answer 3

The first if block will run for all truthy values.

Answer 4

that is about boolean functions, 'is' stands for bool(?)==True.
You know that , their root language was C language but have developed that recent languages through compilers and interpreters, as far as have learned.
If [var]:
means that if that stored value was a true value(either in +ive or -ive , non zero or an immutable value like string or the others).
if [var]==True:
That is about matching value as exactly equal to True.
try those in the code play yard...

varriable=[1, 'true']
for var in varriable :
if var==True:
print(var)
elif var :
print(var, str(2))

# first returns 1
# second returns true2
or try that:-

varriable=[7, 'true']
for var in varriable :
if var==True:
print(var)
elif var :
print(var)

# first returns 7
# second returns true

Answer 5

'is' used to mean matched valued like
print(a is b)
#True or 1
#False or 0
I doubt that to be used, for such cases.