CODEWITHSUNDEEP
python
glider
glider

Reputation: 73

Can we check multiple variables against same expression in python

I know we can check a variable against multiple conditions as 

if all(x >= 2 for x in (A, B, C, D)):
    print A, B, C, D

My question is , can we do the reverse? can we check one or two variables against same conditions(one or two)

null_check = (None,'','None')
if variable1 not in null_check and variable2 not in null_check:
    print (variable1, variable2)

can we rewrite the above code as

if variable1 and variable2 not in null_check:
    print (variable1, variable2)

If yes, which one is a better practice ?

Thanks in advance :)

Upvotes: 0

Views: 82

Answers (3)

Kasravnd
Kasravnd

Reputation: 107347

No you can't do that, but as a pythonic approach you can put your null_check items in a set. And check the intersection:

null_check = {None,'','None'}
if null_check.intersection({var1, var2}): # instead of `or` or `any()` function
    # pass  
if len(null_check.intersection({var1, var2})) == 2: # instead of `and` or `all()` function
    # pass

Upvotes: 1

TigerhawkT3
TigerhawkT3

Reputation: 49330

You can do this very similarly to your first code block:

null_check = (None,'','None')
if all(variable not in null_check for variable in (variable1, variable2)):
    print (variable1, variable2)

Or:

null_check = (None,'','None')
variables = variable1, variable2 # defined elsewhere
if all(variable not in null_check for variable in variables:
    print (*variables)

Upvotes: 1

Cory Kramer
Cory Kramer

Reputation: 117981

You can put the variables in a list or tuple, then use the same idea using all to check that none of them are in your tuple.

if all(var not in null_check for var in (variable1, variable2)):
    print (variable1, variable2)

Upvotes: 3

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