大约有 16,000 项符合查询结果（耗时：0.0399秒） [XML]
How do I unload (reload) a Python module?
...formation from: How do I really delete an imported module?
You can use sys.getrefcount() to find out the actual number of
references.
>>> import sys, empty, os
>>> sys.getrefcount(sys)
9
>>> sys.getrefcount(os)
6
>>> sys.getrefcount(empty)
3
Numbers g...
Run a Python script from another Python script, passing in arguments [duplicate]
...
Try using os.system:
os.system("script2.py 1")
execfile is different because it is designed to run a sequence of Python statements in the current execution context. That's why sys.argv didn't change for you.
...
Format floats with standard json module
... it gives "Map object is not JSON serializable" error, but you can resolve converting the map() to a list with list( map(pretty_floats, obj) )
– Guglie
Oct 11 '18 at 23:54
...
How to properly ignore exceptions
...:
pass
The difference is that the first one will also catch KeyboardInterrupt, SystemExit and stuff like that, which are derived directly from exceptions.BaseException, not exceptions.Exception.
See documentation for details:
try statement
exceptions
...
How do I check if I'm running on Windows in Python? [duplicate]
...
Specifically for Python 3.6/3.7:
os.name: The name of the operating
system dependent module imported. The
following names have currently been
registered: 'posix', 'nt', 'java'.
In your case, you want to check for 'nt' as os.name output:
import os
if os.name == 'nt':
...
There i...
Constantly print Subprocess output while process is running
...f nextline == '' and process.poll() is not None:
break
sys.stdout.write(nextline)
sys.stdout.flush()
output = process.communicate()[0]
exitCode = process.returncode
if (exitCode == 0):
return output
else:
raise ProcessException(command, e...
How to create a file with a given size in Linux?
...much worse once it gets very big, as it will allocate and read that amount into memory before writing. If this is somethig like bs=4GiB you'll probably end up swapping.
– Brian
Sep 29 '08 at 7:40
...
adding directory to sys.path /PYTHONPATH
...the working directory but before the standard interpreter-supplied paths. sys.path.append() appends to the existing path. See here and here. If you want a particular directory to come first, simply insert it at the head of sys.path:
import sys
sys.path.insert(0,'/path/to/mod_directory')
That s...
Print in one line dynamically
...any other languages). Here's a complete example based on your code:
from sys import stdout
from time import sleep
for i in range(1,20):
stdout.write("\r%d" % i)
stdout.flush()
sleep(1)
stdout.write("\n") # move the cursor to the next line
Some things about this that may be surprising...
Controlling a USB power supply (on/off) with Linux
...ernels.
# disable external wake-up; do this only once
echo disabled > /sys/bus/usb/devices/usb1/power/wakeup
echo on > /sys/bus/usb/devices/usb1/power/level # turn on
echo suspend > /sys/bus/usb/devices/usb1/power/level # turn off
(You may need to change usb1 to usb n)
Source: ...