phon 3 Plik tekstowy 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)
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