PYTHON

python how to count the lines in a file

# Basic syntax:
count = len(open('/path/to/the/file.ext').readlines())

Write a Python program to count the number of lines in a text file.

def countlines(fname,mode='r+'):
	count=0
	with open(fname) as f:
		for _ in f:
			count += 1
	print('total number of lines in file : ',count)

countlines('file1.txt')

##########################

with open('file1.txt') as f:
	print(sum(1 for _ in f))

###########################
'''You can use len(f.readlines()),
 but this will create an additional list in memory,
  which won't even work on huge files that don't fit in memory.

'''

python number of lines in file

num_lines = sum(1 for line in open('myfile.txt'))

# Notice: Problem with this solution is that it won't
# 		  count empty line if it is at end of file.

counting number of lines in a text file in python

# You can do it by iterating through a simple for loop
fhand = open('path and the file name')
count = 0
for line in fhand:
  count += 1
print('The number of lines in the file is:', count)