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Python File Operations
Python – Working with files
Python File Operations: Modes
Python File Operations: Writing a file
Python File Operations: CRUD
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| # Create a file | |
| # f = open("live/createfile.txt", "x") | |
| # Create a file called "myfile.txt": | |
| f = open("myfile.txt", "x") | |
| # Open a File on the Server | |
| f = open("demofile.txt", "r") | |
| print(f.read()) | |
| # Open a file on a different location: | |
| f = open("D:\\myfiles\welcome.txt", "r") | |
| print(f.read()) | |
| # Create a new file if it does not exist: | |
| f = open("myfile.txt", "w") | |
| # Open the file "demofile2.txt" and append content to the file: | |
| f = open("demofile2.txt", "a") | |
| f.write("Now the file has more content!") | |
| f.close() | |
| # open and read the file after the appending: | |
| f = open("demofile2.txt", "r") | |
| print(f.read()) | |
| # Open the file "demofile3.txt" and overwrite the content: | |
| f = open("demofile3.txt", "w") | |
| f.write("Woops! I have deleted the content!") | |
| f.close() | |
| # open and read the file after the appending: | |
| f = open("demofile3.txt", "r") | |
| print(f.read()) | |
| """ | |
| # Overwriting a file with a content | |
| f = open('live/createfile.txt', 'w') | |
| f.write('Overwrite existing data.') | |
| f.flush() | |
| """ | |
| # Append a file with a content | |
| f = open('live/createfile.txt', 'a') | |
| f.write('\nAppend this text.') | |
| f.flush() | |
| f.close() | |
| # read a file with a content | |
| f = open('live/createfile.txt') | |
| print(f.read()) | |
| os.remove('live/createfile.txt') |
by
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| { | |
| "name": "Jason", | |
| "hobbies": ["music", "programming", "games"], | |
| "job": "Software Developer" | |
| } |
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| import json | |
| import os | |
| cwd = os.getcwd() # Get the current working directory (cwd) | |
| files = os.listdir(cwd) # Get all the files in that directoryclea | |
| print("Files in %r: %s" % (cwd, files)) | |
| if os.path.isfile('sample-programs/system/input.json'): | |
| print('The file does exist.') | |
| else: | |
| print('The file does not exist.') | |
| with open('sample-programs/system/input.json', 'r') as input: | |
| obj = json.load(input) | |
| with open('sample-programs/system/output.txt', 'w') as output: | |
| output.write(obj['name'] + "'s Hobbies:\n") | |
| for hobby in obj['hobbies']: | |
| output.write(hobby + "\n") |
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| """ | |
| # File Exist or not | |
| # File Ops | |
| Reading | |
| Writing | |
| Appending | |
| Deleting | |
| """ | |
| import json | |
| import os | |
| # f = open('myfile.txt') | |
| cwd = os.getcwd() # Get the current working directory (cwd) | |
| files = os.listdir(cwd) # Get all the files in that directoryclea | |
| print("Files in %r: %s" % (cwd, files)) | |
| if os.path.isfile('live/myfile.txt'): | |
| print('The file does exist.') | |
| else: | |
| print('The file does not exist.') | |
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