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Cron and virtualenv
I am trying to run a Django management command from cron. I am using virtualenv to keep my project sandboxed.
9 Answers
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Fixing the order of facets in ggplot
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Here's a solution that keeps things within a dplyr pipe chain. You sort the data in advance, and then using mutate_at to convert to a factor. I've modified the data slightly to show how this solution can be applied generally, given data that can be sensibly sorted:
# the da...
Get the current git hash in a Python script
...nv['LC_ALL'] = 'C'
out = subprocess.Popen(cmd, stdout = subprocess.PIPE, env=env).communicate()[0]
return out
try:
out = _minimal_ext_cmd(['git', 'rev-parse', 'HEAD'])
GIT_REVISION = out.strip().decode('ascii')
except OSError:
GIT_REVISION = "Unknown"...
Reading a huge .csv file
...ows where 'col_1' value grater than one
.pipe(lambda x: x[x.col_1 > 0] ))
df_lst += [tmp_df.copy()]
# And finally combine filtered df_lst into the final lareger output say 'df_final' dataframe
df_final = pd.concat(df_lst)
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GCC dump preprocessor defines
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you can use -include compiler option to avoid pipes
– mymedia
Mar 11 at 9:35
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Linux的诞生和发展 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...。
0.02 (1991.10.5)该版本以及0.03 版是内部版本，目前已经无法找到。
0.03 (1991.10.5)
0.10 (1991.10)由Ted Ts'o 发布的Linux 内核版本。
0.11 (1991.12.8)基本可以正常运行的内核版本。
0.12 (1992.1.15)主要加入对数学协处理器的软件模拟程序。...
Make sure only a single instance of a program is running
...hat Firefox does, for example. I don't know if they use TCP ports or named pipes or something like that, 'though).
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Length of string in bash
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Seriously? a pipe, a subshell and an external command for something that trivial?
– gniourf_gniourf
Dec 26 '16 at 21:26
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Read password from stdin
...e getpass() is still prompting me and waiting for a password even though I piped the password to my script
– Michael
Dec 21 '13 at 21:30
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sed edit file in place
... own as the sole purpose of sed is to act as an editor on the "stream" (ie pipelines of stdin, stdout, stderr, and other >&n buffers, sockets and the like). With this in mind you can use another command tee to write the output back to the file. Another option is to create a patch from piping ...