Search within a file in python -

Search within a file in python -

i working results infra sound detectors have glitches info points recorded '0'. worthless data. want able search file '0', count them , print out result.

all have been able far search file '0' , true/false answer.

this code:

def findzero( fname ): if os.path.isfile(fname): f = open( fname ) s = mmap.mmap(f.fileno(), 0, access=mmap.access_read) if s.find('0') != -1: print 'true' else: print '' return;

scan file line line, counting lines '0':

def countzero(fname): try: open(fname) f: homecoming sum(line.strip() == '0' line in f) except ioerror: # not file can read homecoming none

the python bool type subclass of int, , true equal 1, false 0, can sum booleans count.

if needed percentage, need count lines , 0-counts separately:

def count_zeros_and_lines(fname): try: open(fname) f: zeros = total = 0 line in f: if line.strip() == '0': zeros += 1 total += 1 homecoming zeros, total except ioerror: # not file can read homecoming none

this returns count of zeros, , total line count.

python python-2.7