mysql - Python 3.X reading null values from a table -


let's assume have resultset couple of fields. 1 of these fields coming 'null' or in python language none. need create method replace whole nones in field specific word example 'unknown'. here method.

def definegender(x):     if x not none:       return x     else:         x = 'unknown'         return x

now testing

z= none definegender(z) print('{}'.format(z))

unfortunately, approach not work, please can guys let me know best way create validation.

what aim assign reference. languages c, c++ , c# possible. in java , python not. can alter state (if instance pass list, can update elements, cannot set list it).

you can use assignment operator:

z = none z = definegender(z) print('{}'.format(z))

furthermore can make code shorter using ternary operator in definegender function:

def definegender(x):     return x if x not none else 'unknown'

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