Linux Cache

>>> #多条件比较，先给变量赋值，再多条件比较
>>> middle = 5
>>> 1 < middle < 10
True
>>> #变量比较
>>> two = 1 + 1
>>> three = 1 + 3
>>> two < three
True
>>> #字符串比较
>>> 'Eddie Van Helen' == 'eddie van helen'
False
>>> #两个函数结果比较
>>> abs(-10) > len('length of this word')  
False
>>> #不同类型的对象不能使用“<”，“>”，“<=”，“>=”进行比较，但可以使用“==”，“!=”
>>> 42 > 'the answer'
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: '>' not supported between instances of 'int' and 'str'
>>> 42 == 'the answer'
False
>>> 42 != 'the answer'
True
>>> 5.0 == 5
True
>>> 3.0 > 1
True
>>> # True = 1 与 False = 0
>>> True > False
True
>>> True + False > False + False
True
>>>

#自定义函数，指定两个默认参数
def create_file(filename, content, censored_content = 'lame', changed_content = 'Awesome'):
    full_path = 'C:/Users/harveymei/Desktop/'
    full_name = full_path + filename + '.txt'
    file = open(full_name,'w')
    #在写入操作时对传入内容参数进行匹配替换
    #file.write(content)
    file.write(content.replace(censored_content, changed_content))
    file.close()
    print('Done')

#调用函数创建文件，传入文件名参数及内容参数
create_file('helloworld', 'Python is lame!')

PS C:\Users\harveymei> & C:/Users/harveymei/AppData/Local/Programs/Python/Python38/python.exe c:/Users/harveymei/hello.py
Done
PS C:\Users\harveymei> type .\Desktop\helloworld.txt
Python is Awesome!     
PS C:\Users\harveymei> 

#自定义函数,敏感词删剪替换
#指定参数censored_word和changed_word默认值
def text_filter(word, censored_word = 'lame', changed_word = 'Awesome'):
    #替换word中匹配的censored_word为changed_word
    #返回replace()处理后的结果
    return word.replace(censored_word, changed_word)

#自定义函数，写文件
def create_file(filename, content):
    full_path = 'C:/Users/harveymei/Desktop/'
    full_name = full_path + filename + '.txt'
    file = open(full_name,'w')
    file.write(content)
    file.close()

#自定义函数，调用以上两个函数，分别替换关键词，写文件
def censored_create_file(filename, content):
    #调用敏感词删剪函数text_filter()先替换内容
    clean_content = text_filter(content)
    #调用生成文件函数create_file(),使用替换过的内容变量clean_content作为参数传入
    create_file(filename, clean_content)

#调用函数创建文件，传入文件名参数及内容参数
censored_create_file('helloworld', 'Python is lame!')
print('Done')

PS C:\Users\harveymei> & C:/Users/harveymei/AppData/Local/Programs/Python/Python38/python.exe c:/Users/harveymei/hello.py
Done
PS C:\Users\harveymei> type .\Desktop\helloworld.txt
Python is Awesome!     
PS C:\Users\harveymei>