Language / Functions
Definition
A function is a named sequence of statements.
""" Function definition
A function is a named sequence of statements
To end the function, you have to enter an empty line
Split a single instruction on multple lines with \
"""
def myfunc(a):
return a%2
def myprint(x):
return
print(myfunc(3)) # 1
print(myprint("2")) # None
print("Hello " + \
"World") # Hello World
Import
To use a function from a module, you have to import it.
""" Import modules
To use a function from a module, you have to import it
When you save your scripts don't use
Python modules names like math, sys, csv
"""
import math
print(math.pi) # 3.141592653589793
print(math.sin(math.pi/2)) # 1.0
Local variable
After the function is called, the local variable is destroyed.
""" Local, global variables
Local variable is destroyed after the function is called
To modify a global variable from within a function, use global statement
"""
def myfunc(a, b):
c = a + b # Look Here
return c
n = 0
def parse():
global n # Look Here
for i in range(10):
n = i
print(myfunc(3,4)) # 7
parse(); print(n) # 9
try:
print(c)
except Exception as e:
print(e) # name c not defined
Last update: 61 days ago
