[Python] Variable that is a method call

[Frozen Forest]

It's possible to store a call in variable then use this "call variable", or maybe there is something similar? Instead of having if..elif.else statements when the answer is known after the first test.

Pseudo code


operation = None
if var in 'read1':
operation = read(True)
elif var in 'read2':
operation = read(False)
else:
operation = read(True) + Read(False)

while True:
data = operation
# use data

[cgroza]

You can do this, if this is what you mean:




def Function(s):
print s

my_func = Function
my_func("test")

[smartbei]

You can indeed do things like this. One way would be as cgroza posted, creating a function for each option and setting a temporary variable to the wanted one:


def option1():
print '1'
def option2():
print '2'

if flag:
chosen_option = option1
else:
chosen_option = option2

while True:
data = chosen_option()


Something that could make this more useful perhaps is defining the functions in place. This is especially true if there are many small options. To do this use the lambda keyword:



...
if flag:
chosen_option = lambda: print '1'
else:
chosen_option = lambda: print '2'
...

You can read more about python and lambda here: http://www.secnetix.de/olli/Python/lambda_functions.hawk