For a loop inside, if the condition
print "Select the action you want to perform(A or B)"
print "(A) uppper case"
print "(B) count number of lines"
option = raw_input("Enter your option(A or B):")
if option.upper() == "A":
for line in x:
line = line.upper()
print line
elif option.upper() == "B":
for line in x:
line = line.upper()
count = count + 1
print "total lines:", count
else:
print "incorrect option"
exit()
When the user types A , it only prints one line (last line) in uppercase instead of 250 lines.
Counterworks great.
PS I have not provided the first part of the code, which is for entering the file name to open.
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just type your print statement as:
if option.upper() == "A":
for line in x:
line = line.upper()
print line
Python plays a very important role in indentation, by deviating from the print statement (as in this code), the interpreter will consider it outside of the loop for
, and it will only be executed once after the complete loop execution for
.
To execute a statement print
on each iteration of the loop for
, you need to defer it inside the scope of the for loop.
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