#__author: "Pizer Wang"
#__date: 2018/1/28

a = "Let's go"
print(a)
print("-------------------")

a = 'Let\'s go'
print(a)
print("-------------------")

print("hello" * 3)
print("helloworld"[2:])
print("-------------------")

print("ell" in "helloworld")
print("-------------------")

print("Pizer is a good student"
 
)
print("%s is a goog student" % "Pizer")
print("-------------------")

a = "1234"
b = "abcd"
c = "[email protected]#$"
d = a + b + c
print(d)

d = "".join([a, b, c])
print(d)
d = ", ".join([a, b, c])
print(d)
d = "++".join([a, b, c])
print(d)
print("-------------------")


print("string的內建方法")
str = "helloworld"
 

print(str.count("l"))           #統計元個數
print(str.capitalize())         #首字母大寫
print(str.center(25, "-"))      #居中
print(str.endswith("d"))
print(str.endswith("world"))
print(str.endswith("word"))     #是否以某個內容結尾
print(str.startswith("hello"))  #是否以某個內容開始
str = "hello\tworld"
print(str.expandtabs(tabsize=10
 
))
print("-------------------")
str = "helloworld {name} is {age}"
print(str.find("w"))            #查詢到第一個元素並將索引值返回
print(str.format(name = "Pizer", age = 18))
print(str.format_map({"name":"Jone", "age":25}))
print("-------------------")
print(str.index("w"))
#print(str.index("www"))        #報錯
print(str.find("wwww"))
print("-------------------")

str = "123abc"
print(str.isalnum())
str = "123"
print(str.isalnum())
str = "abc"
print(str.isalnum())
str = "[email protected]$"
print(str.isalnum())
str = "中國萬歲"
print(str.isalnum())
print("-------------------")

print("123456".isdecimal())
print("123456ff".isdecimal())
print("123456789".isdigit())
print("12345.6789".isdigit())
print("12345.6789".isnumeric())
print("-------------------")

print("34abc".isidentifier())
print("_34abc".isidentifier())
print("abc".islower())
print("abC".islower())
print("ABC".isupper())
print(" ".isspace())
print("-------------------")

print("Hello Jone".istitle())
print("Good morning".istitle())
print("-------------------")

print("Hello Jone".lower())
print("Good morning".upper())
print("Hello Jone".swapcase())
print("-------------------")

print("Hello world".ljust(20, "-"))
print("Hello world".rjust(20, "-"))
print("    Hello world  \t   \n")
print("    Hello world   ".strip())
print("    Hello world   ".lstrip())
print("    Hello world   ".rstrip())
print("-------------------")

print("Hello Jone Jone".replace("Jone", "Pizer"))
print("Hello Jone Jone".replace("Jone", "Pizer", 1))
print("My title".find("t"))
print("My title".rfind("t"))
print("-------------------")

print("Hello world".split(" "))
print("Hello world".split("l", 1))
print("Hello world".rsplit("l", 1))
print("hello jone".title())
print("-------------------")

#重要的字串方法
# print(st.count('l'))
# print(st.center(50,'#'))   #  居中
# print(st.startswith('he')) #  判斷是否以某個內容開頭
# print(st.find('t'))
# print(st.format(name='alex',age=37))  # 格式化輸出的另一種方式   待定：?:{}
# print('My tLtle'.lower())
# print('My tLtle'.upper())
# print('\tMy tLtle\n'.strip())
# print('My title title'.replace('itle','lesson',1))
# print('My title title'.split('i',1))

執行結果:

Let’s go

Let’s go

hellohellohello

lloworld

True

Pizer is a good student

Pizer is a goog student

[email protected]#[email protected]#$\text{<a href="/cdn-cgi/l/email-protection" class="\_\_cf\_email\_\_" data-cfemail="4170737275202322256001">[email protected]</a>\#}$
1234, abcd, [email protected]#$

[email protected]#$

string的內建方法
3
Helloworld
——–helloworld——-
True
True
False
True

hello world

5
helloworld Pizer is 18

helloworld Jone is 25

5

-1

True
True
True
False

True

True
False
True
False

False

False
True
True
False
True

True

True

False

hello jone
GOOD MORNING

hELLO jONE

Hello world———
———Hello world
Hello world

Hello world
Hello world

Hello world

Hello Pizer Pizer
Hello Pizer Jone
3

5

[‘Hello’, ‘world’]
[‘He’, ‘lo world’]
[‘Hello wor’, ‘d’]

Hello Jone