vars=['T', 'U', 'V', 'Z3']
for var in vars:
....
for no in range(0, 10) # Loop for 0-9．Note that range is from the initial value to a value smaller than the final value.
If there is "break" in the loop, loop ends at that point.
If there is "continue" in the loop, procedure returns to the begining of the loop without processing the rest of the loop.
You can combine multiple lists into one for loop using "zip"
Example:
lons=[320, 330, 80, 130]
lats=[ 45, 70, 65, 40]
for (lon,lat) in zip(lons,lats):
print lon,lat
In order to get index, use enumerate as
names=['a','b','c','d']
for index, name in enumerate(names):
print(index,name)