var1 = 0
var2 = 0
var3 = 0
with open(f'./tmp/tmp', 'w') as file:
file.write('line 1\n')
var1 = file.tell()
file.close()
with open('./tmp/tmp', 'a') as file:
file.write('line 2\n')
var2 = file.tell()
file.close()
with open('./tmp/tmp', 'a') as file:
file.seek(var1)
file.write('line 3\n')
file.close()
with open('./tmp/tmp', 'a') as file:
file.seek(var2, var3)
file.write('line 4\n')
file.close()line 1
line 2
line 3
line 4
with open('tmp', 'w') as file:
file.write('line 1\n')
with open('tmp', 'a') as file:
file.write('line 2\n')
with open('tmp', 'r+') as fd:
contents = fd.readlines()
contents.insert(1, 'line 3\n')
fd.seek(0)
fd.writelines(contents)
with open('tmp', 'r+') as fd:
contents = fd.readlines()
contents.insert(2, 'line 4\n')
fd.seek(0)
fd.writelines(contents)
with open('tmp') as f:
for line in f:
print(line, end="")