- Open file
handle = open(filename,mode)
returns a handle use to manipulate the file.
- Processing files
xfile = open('test.txt')
for cheese in xfile:
print(cheese)
- Counting Lines in a File
fhand = open('test.text')
count = 0
for line in fhand:
count = count +1
print('Line Count', count)
- Reading the 'whole' File
fhand = open('test.txt')
inp = fhand.read()
print(len(inp)
print(inp[:20])
- Searching Through a File
fhand = open('test.txt')
for line in fhand:
line = line.rstrip() #ignore the \n
if line.startswith('from'):
print(line)
alternative way
for line in fhand:
line = line.rstrip()
if not line.starswith('from'):
continue
print(line)
- Count frenquency
counts = dict()
names = ['hello','youtube','yes','hello']
for name in names:
if name not in counts:
counts[name] = 1
counts[name] = counts[name] + 1
or
counts = dict()
names = ['hello','youtube','yes','hello']
for name in names:
counts[name] = counts.get(name,0) +1
