python how to count the lines in a file
# Basic syntax:
count = len(open('/path/to/the/file.ext').readlines())python how to count the lines in a file
# Basic syntax:
count = len(open('/path/to/the/file.ext').readlines())python 3 text file leng
f = open("filename", "r") #Load file in any mode that's able to read, ie r, r+, w+ etc
#to get length
len(f.readlines())
#To iterate over each line
for line in f.readlines(): #file.readlines(), splits the file into a list, where each element is a seperate line
print(line)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))
##########################
with open('file1.txt') as f:
for lno , line in enumerate(f,1):
pass
print('total lines:',lno)
###########################
'''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.
'''how to know how much lines a file has using python
filename = "test.txt"
count = 0
with open(filename, 'r') as f:
for line in f:
count += 1
print("Total number of lines is:", count)Copyright © 2021 Codeinu
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