Reading a file and processing it line by line is the most memory-efficient way, especially when the file is too huge, in the four below Python programs we will see how to read a file line by line,
Example 1:file_name = "sample-file.txt";
with open(file_name) as sample_file:
line = sample_file.readline()
while line:
line = sample_file.readline()
print(line.strip())
file_name = "sample-json-file.txt";
with open(file_name) as myFile:
for line in myFile:
print(line.rstrip())
If memory is not a concern, you can read the whole file in memory and store it as a list,
# Reading file line-by-line in
# memory at once
file_name = "sample-json-file.txt";
with open(file_name) as myFile:
lines = myFile.readlines()
for line in lines:
print(line.rstrip())
lines = tuple(open("sample-json-file.txt", 'r'))
for line in lines:
print(line.rstrip())
Content of file - Python Example
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