python Programming Glossary: iter

http://stackoverflow.com/questions/12419198/python-subprocess-readlines-hangs

1 stdout PIPE stderr STDOUT close_fds True for line in iter proc.stdout.readline b'' print line proc.stdout.close proc.wait..

Differences between isinstance() and type() in python

http://stackoverflow.com/questions/1549801/differences-between-isinstance-and-type-in-python

x basestring return treatasscalar x try return treatasiter iter x except TypeError return treatasscalar x You could say.. x basestring return treatasscalar x try return treatasiter iter x except TypeError return treatasscalar x You could say that..

In Python, how do I determine if an object is iterable?

http://stackoverflow.com/questions/1952464/in-python-how-do-i-determine-if-an-object-is-iterable

Python how do I determine if an object is iterable Is there a method like isiterable The only solution I have.. if an object is iterable Is there a method like isiterable The only solution I have found so far is to call hasattr.. solution I have found so far is to call hasattr myObj '__iter__' But I am not sure how fool proof this is. python iterable..

How does zip(*[iter(s)]*n) work in Python?

http://stackoverflow.com/questions/2233204/how-does-zipitersn-work-in-python

does zip iter s n work in Python I saw this in the Python documentation for.. zip . Apparently if s is 1 2 3 4 5 6 7 8 9 and n is 3 zip iter s n returns 1 2 3 4 5 6 7 8 9 . How exactly does this work I'm.. now. The magic or what I was not understanding was in the iter . Because it's the same iter when zip calls next on each of..

read subprocess stdout line by line

http://stackoverflow.com/questions/2804543/read-subprocess-stdout-line-by-line

#works in python 3.0 #for line in proc.stdout for line in iter proc.stdout.readline '' print line.rstrip python subprocess.. line in proc.stdout which reads the entire input before iterating over it. The solution is to use readline instead #filters.. Note according to the documentation the solution with an iterator should be equivalent to using readline except for the read..

Non-blocking read on a subprocess.PIPE in python

http://stackoverflow.com/questions/375427/non-blocking-read-on-a-subprocess-pipe-in-python

def enqueue_output out queue for line in iter out.readline b'' queue.put line out.close p Popen 'myprogram.exe'..

What is the most “pythonic” way to iterate over a list in chunks?

http://stackoverflow.com/questions/434287/what-is-the-most-pythonic-way-to-iterate-over-a-list-in-chunks

is the most &ldquo pythonic&rdquo way to iterate over a list in chunks I have a Python script which takes.. passed in as a list of four element tuples. Currently I'm iterating over it this way for i in xrange 0 len ints 4 # dummy op.. dealing with this situation. The list is discarded after iterating so it needn't be preserved. Perhaps something like this..

Stop reading process output in Python without hang?

http://stackoverflow.com/questions/4417962/stop-reading-process-output-in-python-without-hang

threading def read_output process append for line in iter process.stdout.readline append line def main # start process.. 200 q collections.deque maxlen number_of_lines for line in iter process.stdout.readline q.append line signal.alarm 0 # cancel.. also work on Windows. Here I've used process.stdout as an iterable it might introduce an additional output buffering you could..

Lazy Method for Reading Big File in Python?

http://stackoverflow.com/questions/519633/lazy-method-for-reading-big-file-in-python

f process_data piece Another option would be to use iter and a helper function f open 'really_big_file.dat' def read1k.. def read1k return f.read 1024 for piece in iter read1k '' process_data piece If the file is line based the file..

Rolling or sliding window iterator in Python

http://stackoverflow.com/questions/6822725/rolling-or-sliding-window-iterator-in-python

or sliding window iterator in Python I need a rolling window aka sliding window iterable.. in Python I need a rolling window aka sliding window iterable over a sequence iterator generator. Default Python iteration.. rolling window aka sliding window iterable over a sequence iterator generator. Default Python iteration can be considered a..

Why is reading lines from stdin much slower in C++ than Python?

http://stackoverflow.com/questions/9371238/why-is-reading-lines-from-stdin-much-slower-in-c-than-python

USED due to potential of buffer overflow. So I wrote this iteration using fgets the safer alternative to gets. Here are the.. BUFFER_SIZE 16384 count sum chunk.count ' n' for chunk in iter partial sys.stdin.read BUFFER_SIZE '' The performance of this..