How python uses the join () function

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Join () inserts a specified character after the string to construct a new string _ str= "_" list= ["I", "Love", "You"] _ str.join (list) # return value: I_Love_You inserts an underscore after each list element what are the main application areas of python 1. Cloud computing, typical application OpenStack. 2. WEB front-end development, many large websites are developed by Python. 3. Artificial intelligence applications, which are based on big data's analysis and deep learning, have essentially been unable to leave python. 4. System operation and maintenance project, the standard configuration of automatic operation and maintenance is python+Django/flask. 5. Financial management analysis, quantitative transaction, financial analysis. 6. Big data's analysis.

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