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# 1,将下面的字符串str1的敏感字符*都去掉:
#     然后再将str1的空格都去掉;
#      str1 = "H e  l  ** l    o    Wo r         L d  !"
str1 = "H e  l  ** l    o    Wo r         L d  !"
# 提示: replace('*', "")
str1 = str1.replace('*', "")
str1 = str1.replace(" ", "")
print(str1)


# 2,去掉字符串123@zh@qq.com中的@;
str2 = "123@zh@qq.com"
str2 = str2.replace('@', "")
print(str2)


# 3, 任意给定的一串字符，统计字符串里面的大写字母和小写字母的个数
#   如： str1 = "HelloWorLD123"
str3 = "HelloWorLD123"

count1 = 0
count2 = 0
for c in str3:
    if c.isupper():
        count1 += 1
    elif c.islower():
        count2 += 1

print(count1, count2)


# 4, 获取网址中指定参数的值: https://www.baidu.com/s?name=avery&age=20&sex=male
#   如：参数param="name" 则结果为avery，
#   如：参数param="age" 则结果为20，
#   如：参数param="sex" 则结果为male，
# urlStr = "https://www.baidu.com/s?name=avery&age=20&sex=male"
# param = 'age'
# split()
# 1，按照?拆分=> ['https://www.baidu.com/s', 'name=avery&age=20&sex=male']
# 2, 将'name=avery&age=20&sex=male'按照&拆分 =>['name=avery', 'age=20', sex=male]
# 3, for 遍历 ['name=avery', 'age=20', sex=male]
#       将'name=avery'按照=拆分 => ['name', 'avery']

urlStr = "https://www.baidu.com/s?name=avery&age=20&sex=male"
param = 'sex'

# index = urlStr.find('?')
# s = urlStr[index+1 : ]

url_list = urlStr.split('?')
# print(url_list)  # ['https://www.baidu.com/s', 'name=avery&age=20&sex=male']
param_str = url_list[-1]
# print(param_str)  # 'name=avery&age=20&sex=male'

param_list = param_str.split('&')
# print(param_list)  # ['name=avery', 'age=20', 'sex=male']

d = {}
for param1 in param_list:
    # print(param1)  # 'name=avery'
    list1 = param1.split('=')
    # print(list1)  # ['name', 'avery']
    name = list1[0]  # 名字
    value = list1[1]  # 值

    # if name == param:
    #     print(value)

    d[name] = value

print(d)  # {'name': 'avery', 'age': '20', 'sex': 'male'}
print(d[param])  # 'male'


# 网址的组成:
# https://www.baidu.com/s?name=avery&age=20&sex=male
# https:// : 协议
# www.baidu.com：域名(内部是ip地址)
# /s : 路径
# ? 分隔服务器地址和参数部分
# name=avery&age=20&sex=male： 参数部分，不同参数使用&符号隔开， 每个参数的格式: name=avery



# 5,将字符串按照单词进行逆序，空格作为划分单词的唯一条件
#      如传入:”Welome to Beijing”改为 “Beijing to Welcome”
s = 'Welome to Beijing'
l = s.split()
l.reverse()
# print(l)  # ['Beijing', 'to', 'Welome']
s2 = " ".join(l)
print(s2)


# 6,查找子串出现的次数，返回字符串str中出现子串的次数, count()
#      如传入:”abcabcabc”, “abc”;  返回:3
#          “ababacccababa”, “aba”, 返回：2,   如果返回4呢(选做)
s = "ababacccababa"
s2 = 'aba'
print(s.count(s2))  # 2

count3 = 0
for i in range(len(s)):
    s3 = s[i:]
    # print(s3)
    if s3.startswith(s2):
        count3 += 1

print(count3)  # 4


# 7,将字符中单词用空格隔开
#       已知传入的字符串中只有字母,每个单词的首字母大写，
#       请将每个单词用空格隔开，只保留第一个单词的首字母大写
#       传入:”HelloMyWorld”
#       返回:”Hello my world”

s = 'HelloMyWorld'
s2 = s[0]
for i in range(1, len(s)):
    c = s[i]
    if c.isupper():
        s2 += " "+c.lower()
    else:
        s2 += c

print(s2)  # 'Hello my world'

s = 'HelloMyWorld'
for i in range(len(s)):
    c = s[i]
    if i == 0:
        pass
    else:
        if c.isupper():
            s = s.replace(c, " "+c.lower())

print(s)  # Hello my world