i'm trying to create files, one for each day of the year, and I was thinking I would use while or for for this. but it doesn't seem to work since I'm mixing numbers and letters.
def CreateFile():
date = 101
#this is supposed to be 0101 (first of januar, but since i can't start with a 0 this had to be the other option)
while date <= 131:
name = (date)+'.txt'
date += 1
CreateFile()
You can't concatenate strings and integers:
name = date + '.txt' # TypeError
but you can use str.format to create the filename:
name = "{0}.txt".format(date)
Using str.format also allows you to force four digits, including the leading zero:
>>> "{0:04d}.txt".format(101)
'0101.txt'
(see the documentation for more on formatting options).
Finally, given that you know how many times you will loop, I would recommend a for loop with range here, to avoid initialising and incrementing date manually:
for date in range(101, 132):
name = "{0:04d}.txt".format(date)
...
