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Actual meaning of 'shell=True' in subprocess
...gt; subprocess.call('echo $HOME')
Traceback (most recent call last):
...
OSError: [Errno 2] No such file or directory
>>>
>>> subprocess.call('echo $HOME', shell=True)
/user/khong
0
Setting the shell argument to a true value causes subprocess to spawn an intermediate shell pro...
Passing arguments to C# generic new() of templated type
...ll, and somebody might try to "clean up" and delete it (to cause a runtime error at some random time in the future). You may want to consider adding a dummy function where you use this constructor just so you get a compile error if you try to delete it.
– jrh
O...
How can I brew link a specific version?
...
Unfortunately, brew tap homebrew/versions now gives me an error Error: homebrew/versions was deprecated. This tap is now empty as all its formulae were migrated `
– Juraj Martinka
Jun 14 '19 at 11:57
...
How do I override __getattr__ in Python without breaking the default behavior?
...lled bar. If the attribute is one you don't want to handle, raise AttributeError:
class Foo(object):
def __getattr__(self, name):
if some_predicate(name):
# ...
else:
# Default behaviour
raise AttributeError
However, unlike __getattr__, __ge...
What is a method group in C#?
I have often encountered an error such as "cannot convert from 'method group' to 'string'" in cases like:
5 Answers
...
Client to send SOAP request and receive response
...
I am getting the following error and the code terminates: 'soap' is an undeclared prefix. Line 2, position 18. am I missing something? The SOAP UI request for my webservice can be found here: stackoverflow.com/questions/50430398/…
...
What are file descriptors, explained in simple terms?
... descriptors 0, 1, and 2 are standard input, standard output, and standard error for each running process. A successful initial call to open() will give you file descriptor 3, even if another running process happens to have a file descriptor 3. See the POSIX definition of open(): "The open() functio...
Difference between two dates in Python
...
I have this error on the console: type object 'datetime.datetime' has no attribute 'strptime'
– mauguerra
Dec 7 '11 at 18:00
...
How can sbt pull dependency artifacts from git?
...
The branch only works if set to master, otherwise I get: [error] No project 'project_name' in 'ssh://git@github.com/user/project.git#branch'
– Neil
May 11 '16 at 22:19
...
How to hide output of subprocess in Python 2.7
... PIPE, STDOUT
try:
from subprocess import DEVNULL # py3k
except ImportError:
import os
DEVNULL = open(os.devnull, 'wb')
text = u"René Descartes"
p = Popen(['espeak', '-b', '1'], stdin=PIPE, stdout=DEVNULL, stderr=STDOUT)
p.communicate(text.encode('utf-8'))
assert p.returncode == 0 # u...