2-3
name="Eric"
print("hello"+name+",would you like to learn some python today?")
2-4
name="GYer Baker"
print(name.title())
print(name.upper())
print(name.lower())
2-5
张爱玲说：你如果认识以前的我，也许你会原谅现在的我
talk='张爱玲说："你如果认识以前的我，也许你会原谅现在的我"'
print(talk)
2-6
famous_person="张爱玲说：“"
message="你如果认识以前的我，也许你会原谅现在的我"
str1=famous_person+message
print(str1)
2-7
name="\nGYer"
print(name.lstrip())
print(name.rstrip())
print(name.strip()
