num = 7
print('{0:0>5d}'.format(num))  # left
print('{0:0<5d}'.format(num))  # right
print('{:05d}'.format(num))
print("%0*d" % (5, num))
print(format(num, "05d"))
temp = 'test'
print(temp.rjust(10, '0'))
print(temp.ljust(10, '0'))

00007
70000
00007
00007
00007
000000test
test000000

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