PYTHON

python how to count the lines in a file

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

count lines in file python

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

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.

'''

read a file and count how many lines

# Let's use a text file called file.txt
# the file contains 5 lines of some programming languages in use today:

$ cat file.txt
#Output:
#	JavaScript
#	Java
#	C
#	Python
#	C#


# Method 1 'wc'
# 'wc' command can be used to find the number of lines, characters,
# words, and bytes of a file.

$ wc -l file.txt

# Or

$ wc -l < file.txt

# Or

$ wc -l file.txt

# Output:
#	10 file.txt

# OR

# Method 2 - 'sed'
# 'sed' is a stream editor that can be used to perform basic text transformation 
# of an input file.
# This command is mostly used for find-and-replace functionality and 
# can also be used to find the number of lines of a specified file.

$ sed -n '=' file.txt
# Output:
#	1
#	2
#	3
#	4
#	5

# Or 

# sed -n '$='  which gives the overall number of lines
$ sed -n '$=' file.txt
# Output:
#	5

how to count the lines of code using open in python

# open file in read mode
with open(r"E:demosfiles
ead_demo.txt", 'r') as fp:
    for count, line in enumerate(fp):
        pass
print('Total Lines', count + 1)

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)