os.system

On my machine, I have some software which takes commands in the terminal and returns a list of values. To run it, I have to type something like: pdv -t filename I am trying to run it as part of a python programme. When I run the following: os.system('pdv -t %s' % (epoch_name)) then I get the values that I desire returned to my terminal (where epoch_name is the variable name for the filename). But when I try to write the result to a file: os.system('pdv -t %s % "(epoch_name)" > 123.txt') the file 123.txt is produced but it is empty. I know that I am misplacing the " and/or ' characters, but I

I need to execute the following command through python. rtl2gds is a tool which reads in 2 parameters: Path to a file and a module name rtl2gds -rtl=/home/users/name/file.v -rtl_top=module_name -syn I am reading in the path to the file and module name from the user through argparse as shown below: parser = argparse.ArgumentParser(description='Read in a file..') parser.add_argument('fileread', type=argparse.FileType('r'), help='Enter the file path') parser.add_argument('-e', help='Enter the module name', dest='module_name') args = parser.parse_args() os.system("rtl2gds -rtl=args.fileread -rtl

I'm running this: os.system("/etc/init.d/apache2 restart") It restarts the webserver, as it should, and like it would if I had run the command directly from the terminal, it outputs this: * Restarting web server apache2 ... waiting [ OK ] However, I don't want it to actually output it in my app. How can I disable it? Thanks! lunaryorn Avoid os.system() by all means, and use subprocess instead: with open(os.devnull, 'wb') as devnull: subprocess.check_call(['/etc/init.d/apache2', 'restart'], stdout=devnull, stderr=subprocess.STDOUT) This is the subprocess equivalent of the /etc/init.d/apache2

I have the following function, which has been working great for months. I have not updated my version of Python (unless it happens behind the scenes?). def Blast(type, protein_sequence, start, end, genomic_sequence): result = [] M = re.search('M', protein_sequence) if M: query = protein_sequence[M.start():] temp = open("temp.ORF", "w") print >>temp, '>blasting' print >>temp, query temp.close() cline = blastp(query="'temp.ORF'", db="DB.blast.txt", evalue=0.01, outfmt=5, out=type + ".BLAST") os.system(str(cline)) blast_out = open(type + ".BLAST") string = str(blast_out.read()) DEF = re.search("

There is a way to start another script in python by doing this: import os os.system("python [name of script].py") So how can i stop another already running script? I would like to stop the script by using the name. It is more usual to import the other script and then invoke its functions and methods. If that does not work for you, e.g. the other script is not written in such a way that is conducive to being imported, then you can use the subprocess module to start another process. import subprocess p = subprocess.Popen(['python', 'script.py', 'arg1', 'arg2']) # continue with your code then

I have two files: script1.py and script2.py. I need to invoke script2.py from script1.py and return the value from script2.py back to script1.py. But the catch is script1.py actually runs script2.py through os. script1.py: import os print(os.system("script2.py 34")) script2.py import sys def main(): x="Hello World"+str(sys.argv[1]) return x if __name__ == "__main__": x= main() As you can see, I am able to get the value into script2, but not back to script1. How can I do that? NOTE: script2.py HAS to be called as if its a commandline execution. Thats why I am using os. Ok, if I understand you