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Author: Wind complains about Jiangnan origin: https://www.cnblogs.com/mengjinxiang The author is original, the article is welcome to reprint, if you like, please comment + attention, thank you for your support!   Foreword: Recently I have been writing Python related technical blogs on other blog Forums - > https://blog.csdn.net/JackMengJin P ...

Functional requirements: Query the contact person, input the name, you can query the contact information in the current address book, if the contact person exists, output the contact information, if not, inform Insert a contact, and you can create a new contact in the address book. If the contact already exists, ask if you want to modify the c ...

It has been several days since "later we" was released. I haven't been to see it. There was a ticket refund incident a few days ago. The theme song of the movie was sung by Eason Chan. I specially looked for the MV of the theme song "we" and watched it. It's still that feeling. That day, I saw an official account of the Pyth ...

Preliminary preparation: (1) Install requests (get HTML information for the entire web page) In cmd, use the following command to install requests: pip install requests (2) Install beautiful soup4 (parse HTML information and extract what we need) In cmd, use the following command to install requests: p ...

1, Data type (1) , tips 1. PyCharm: select multiple lines and press Ctrl + / "to comment them out in batch (2) , string 1,startswith(str,[,start][,end]) #Determine whether the string starts with str s = 'lichuanlei' print(s.startswith('le',7,9)) Instance output result: True 2,replace(str_old,str_new[,num]) #Replace string s = 'lichuanlei' ...

IP proxy can be used to prevent IP from being blocked by server due to frequent access. Using the method, add a proxies parameter to the functions of requests: page_text = requests.get(url=url, headers=headers, proxies={'http': '60.167.132.19:9999'} ) The free IP proxy that can be used can be obta ...

pyspark learning -- 2. pyspark's running method attempt and various sample code attempts Operation method Pycharmrun spark operation in the system: spark submit Start spark task run Sample code Streaming text processing streaming context Stream text word count Error reporting summary Operati ...

Title Description: Given the main string s and pattern string P, determine whether P is a substring of S. if so, find out the subscript of P in s for the first time. Method: Direct calculation method KMP 1. Direct calculation method Suppose the main string S = "S0S1S2 Sm ", mode string P = ...

Catalog I. conclusion 2, C code 3, Python code I. conclusion I haven't written the code for a long time. I read the python list and dictionary again About the chain list of C: The nodes of linked list can be realized by nesting lists and dictionaries About sorting: sorted() is a python function, ...

Reference blogger article https://blog.csdn.net/u010976445/article/details/50819287 To kill and restart pycharm program under Mac as an example to write script, using Python 3.6 environment 1, Kill process ps -ef | grep pycharm | awk '{print $2}' | xargs kill -9  # After ps -ef | grep pycharm | awk '{print }' | xargs is exe ...