Why the file I created is not created?

[destoriNAVY]

Code: Select all

with open("foo.txt", "w") as f:
    f.write("Life is too short, you need python")

As I expected, a text file should be created in PYBFLASH(E:), but it is not. How can I generate it?

IN PUTTY, when I run that code, it just showed to me '34'

but what I want is make 'text file'. What am I doing for solving this problem?

[dhylands]

34 is the return value from f.write which is the number of bytes written to the file.

What makes you think that the file wasn't created?

To see what files are create, you can use :

Code: Select all

import os
os.listdir('/flash')

[pythoncoder]

Is this an instance of this issue where the file may not be visible to Windows (E:)?

[dhylands]

Ah yes - could very well be.

Files created on the pyboard will be "unknown" over MSC until the pyboard in unmounted and remounted, and then only if Windows didn't try to write some files.

If both windows and the pyboard try to write to an MSC filesystem, then the filesystem will likely get corrupted.

[pythoncoder]

In my opinion (and experience) MSC mode is a recipe for corruption. I always disable it.

[destoriNAVY]

I cannot understand what you guys said.

Code: Select all

import os
with open("foo.txt", "w") as f:
    f.write("Life is too short, you need python")
os.listdir('')

I tried to the 'os.lisitdir('\flash')'
but "foo.txt" was not created.

[Roberthh]

try uos.listdir("/flash") (forward slash, not backslash)

[destoriNAVY]

foo.txt was not created in my virtual memory.

Code: Select all

with open("foo.txt", "w") as f:
    data=f.write("Life is too short, you need python")
print(data)
os.listdir('/flash')

when I used uos.lisdir, there was an error like this, 'NameError: name 'uos' isn't defined'

if that code successfully run, is text file created in PYBFLASH(E:)?

[Roberthh]

The module os ias an alias to uos with micropython. Which one to use depends on how you imported it. Both ways work. Uisng uos most of the time, I used that for my example.

[destoriNAVY]

I uploaded an image that is a screenshot of my monitor screen.

In puTTY, I found the 'foo.txt'

But, in File Explorer(PYBFLASH), I couldn't find 'foo.txt'

the final goal is By creating an image, the image(jpg) file need to be created in file explorer.

To do this, I need to create a jpg file in File Explorer.

How do I open a file by double clicking it?