File mode 'w+'

[cagiva]

Does MicroPython support the 'w+' file mode?

w+ : Opens a file for both writing and reading. Overwrites the existing file if the file exists. If the file does not exist, creates a new file for reading and writing.

Code: Select all

  with open('log.tx', 'w+') as f:
         v = int(f.read())
         v = v+1
         f.write(str(v))

[benalb]

Does MicroPython support the 'w+' file mode?

Code: Select all

MicroPython v1.9.2-144-g98dd126 on 2017-10-05; ESP module with ESP8266
Type "help()" for more information.
>>> with open('test.txt', 'w+') as f:
...     f.write('hello, world')
...     
...     
... 
12
>>> import uos
>>> uos.listdir("/")
['boot.py', 'webrepl_cfg.py', 'max7219.py', 'lanmon.py', 'test.txt']

Code: Select all

 benalb@t410  ~/tmp/micropython  
ampy -p /dev/ttyUSB0 get test.txt 
hello, world

on esp8266, yes.