python - Not getting any error messages from failed subprocess.Popen -



python - Not getting any error messages from failed subprocess.Popen -

i set subprocess.popen generate pdf through pdflatex. code snippet:

process = subprocess.popen(command, stdout=subprocess.pipe, shell=true) output, err = process.communicate() print output print err

it works fine, problem error message. if pdflatex doesn't manage generate file, e.g. message "fatal error occured, no output pdf file produced!" @ end of printed output, still "none" printed out err.

any insight appreciated

edit: adding stderr=subprocess.pipe helps. don't "none" anymore, blank error message regardless of whether or not generation of pdf successful. looks this:

process = subprocess.popen(command, stdout=subprocess.pipe, stderr=subprocess.pipe, shell=true) same above

try this：

fout = open("temp.txt", "w") process = subprocess.popen(cmd, stdout=subprocess.pipe, stderr=fout, shell=true)

i prefer subprocess.check_output(), more convenient.

python subprocess popen pdflatex communicate

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