3.13
s="Python String"
print(s.upper())
print(s.lower())
print(s.find('i'))
print(s.replace('ing','gni'))
print(s.split(' '))3.14
print("{:>15s}:{:<8.2f}".format("Length",23.87501))3.15
number=389
print(f"二进制:{bin(number)}")
print(f"八进制:{oct(number)}")
print(f"十进制:{number}")
print(f"十六进制:{hex(number)}")
char=chr(number)
print(f"Unicode:{char}")
