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In Python (>2.7) does the code :
open('tick.001', 'w').write('test')
has the same result as :
ftest = open('tick.001', 'w')
ftest.write('test')
ftest.close()
and where to find documentation about the 'close' for this inline functionnality ?
434
If file cannot be opened an error occurs (OSError). mode – This is where you will specify the purpose of opening a file. For example, ‘r’ (the default) value opens a file in reading mode for text files.
For example, ‘r’ (the default) value opens a file in reading mode for text files. If you require writing to a text file, then use ‘w’ mode. For opening a file in write mode for appending text, use the ‘a’ value. The detailed list of modes is given in the last section. buffering – Set the buffering off or on by using an Integer value.
There are many modes for opening a file: 1 r - open a file in read mode 2 w - opens or create a text file in write mode 3 a - opens a file in append mode 4 r+ - opens a file in both read and write mode 5 a+ - opens a file in both read and write mode 6 w+ - opens a file in both read and write mode
Closing a File. The file (both text and binary) should be closed after reading/writing. Closing a file is performed using the fclose() function. fclose(fptr); Here, fptr is a file pointer associated with the file to be closed.
The close() here happens when the file object is deallocated from memory, as part of its deletion logic. Because modern Pythons on other virtual machines — like Java and .NET — cannot control when an object is deallocated from memory, it is no longer considered good Python to open() like this without a close(). The recommendation today is to use a with statement, which explicitly requests a close() when the block is exited:
with open('myfile') as f:
# use the file
# when you get back out to this level of code, the file is closed
If you do not need a name f for the file, then you can omit the as clause from the statement:
with open('myfile'):
# use the file
# when you get back out to this level of code, the file is closed
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