# Program to show various ways to read and write data in a file.
# https://www.geeksforgeeks.org/reading-writing-text-files-python/
f = open("myfile.txt", "w")
L = ["This is Beijing \n", "This is Paris \n", "This is London \n"]

f.write("Hello \n")		# \n = new line char
f.writelines(L)
f.close()

print("f.read( )	whole file (text)")
print("f.read(n)	n chars")
print("f.readline()	1 line")
print("f.readline(n)	min(n chars, 1 line)")
print("f.readlines()	whole file (list)")
print()

#----------
f = open("myfile.txt", "r+")
print("1.f.read()	whole file (text)")
print(f.read())

#----------
f.seek(0)
print("2.f.read(9)	n chars")
print(f.read(9))
print()

#----------
# seek(n) takes the file handle to the nth byte from the beginning.
f.seek(0)
print("3.f.readline()	1 line")
print(f.readline())

#----------
f.seek(0)
print("4.f.readline(9)	min(n chars, 1 line)")
print(f.readline(9))

#----------
f.seek(0)
print("5.f.readlines()	whole file (list)")
print(f.readlines())
print()
f.close()