samp_string = "Whatever you are, be a good one."

for i in samp_string:

    print(i)

for i in range(,len(samp_string)-,):

    print(samp_string[i]+samp_string[i+])

print('A=',ord("A"))

print('65=',chr())

print('桃：',ord("桃"))

print('',chr())

# # You can get a character by referencing an index

# print(samp_string[])

print(samp_string[])

# # Get the last character

print(samp_string[-])

#

# # Get the string length

print("Length : ", len(samp_string))

#

# # Get a slice by saying where to start and end

# # The 4th index isn't returned

print(samp_string[:])

#

# # Get everything starting at an index

print(samp_string[:])

# print()

#

print(samp_string)

print(samp_string[::])

print(samp_string[::])

#

# # Reverse the string

print(samp_string[::-])

# # Palindrome

print('I did, did I?'[::-])

print('No lemon, no melon'[::-])

#

# # Practical use

url = "http://pythonabc.org"

# Get the top level domain

print(url[-:])

# Print the url without the http://

print(url[:])

# Print the url without the http:// or the top level domain

print(url[:-])

my_list=[, , , , , , , , , ]

#        , , , , , , , , ,

#       -,-,-,-,-,-,-,-,-,-

# 取其中一个值

print(my_list[])

print(my_list[-])

print(my_list[-])

# 取其中几个值

print(my_list[:])

print(my_list[-:-])

print(my_list[-:-:])

# 逆序输出

print(my_list[::-])

print(my_list[-:-:-]) # 注意逆序输出，开始点在结束点的后面

print(my_list[-:-:-]) # 注意逆序输出，开始点在结束点的后面

strList=["string",,21.0]

# 列表基本操作

print("列表长度：",len(strList))

print("列表输出",strList)

print("两个列表相加为一个列表：",my_list+strList)

# 判断一个元素是否为列表中的元素

print("string" in strList)

#  ************列表相关方法*************************

# 找出特定元素的索引,字符串使用find方法找到，列表用index方法找到

print(strList.index())

for element in strList:

    print("{}:{}".format(strList.index(element),element))

# 特定元素的的个数   字符串和数组都是使用count方法计算特定子字符串和元素的个数

print("string 的个数：",strList.count('string'))

# 添加元素

strList.append("final")

print("string 的更新后个数：",len(strList))