Permalink
Find file
Fetching contributors…
Cannot retrieve contributors at this time
107 lines (86 sloc) 2.9 KB
"""Miscellaneous utilities to support some of the tsvutils scripts"""
import sys,csv,codecs
warning_count = 0
warning_max = 20
def warning(s):
global warning_count
warning_count += 1
if warning_count > warning_max: return
print>>sys.stderr, "WARNING: %s" % s
def cell_text_clean(text):
s = text
# um i can't remember what subclasses which
if isinstance(s,str) and not isinstance(s,unicode):
s = unicode(s, 'utf8', 'replace')
if "\t" in s: warning("Clobbering embedded tab")
if "\n" in s: warning("Clobbering embedded newline")
if "\r" in s: warning("Clobbering embedded carriage return")
s = s.replace("\t"," ").replace("\n"," ").replace("\r"," ")
s = s.encode('utf-8')
return s
def fix_stdio():
sys.stdout = IOWrapper(sys.stdout)
class IOWrapper:
# I like to press Ctrl-C; why is Python yelling at me?
def __init__(self, fp):
self.fp = fp
def write(self,*a,**k):
try:
self.fp.write(*a,**k)
except IOError, e:
if e.errno == 32: # broken pipe
sys.exit(0)
raise e
###################
# http://docs.python.org/library/csv.html
import csv, codecs, cStringIO
class UTF8Recoder:
"""
Iterator that reads an encoded stream and reencodes the input to UTF-8
"""
def __init__(self, f, encoding):
self.reader = codecs.getreader(encoding)(f)
def __iter__(self):
return self
def next(self):
#s = self.reader.next()
#return s.encode('utf-8','replace')
return self.reader.next().encode("utf-8")
class UnicodeReader:
"""
A CSV reader which will iterate over lines in the CSV file "f",
which is encoded in the given encoding.
"""
def __init__(self, f, dialect=csv.excel, encoding="utf-8", **kwds):
f = UTF8Recoder(f, encoding)
self.reader = csv.reader(f, dialect=dialect, **kwds)
def next(self):
row = self.reader.next()
return [unicode(s, "utf-8") for s in row]
def __iter__(self):
return self
class UnicodeWriter:
"""
A CSV writer which will write rows to CSV file "f",
which is encoded in the given encoding.
"""
def __init__(self, f, dialect=csv.excel, encoding="utf-8", **kwds):
# Redirect output to a queue
self.queue = cStringIO.StringIO()
self.writer = csv.writer(self.queue, dialect=dialect, **kwds)
self.stream = f
self.encoder = codecs.getincrementalencoder(encoding)()
def writerow(self, row):
self.writer.writerow([s.encode("utf-8") for s in row])
# Fetch UTF-8 output from the queue ...
data = self.queue.getvalue()
data = data.decode("utf-8")
# ... and reencode it into the target encoding
data = self.encoder.encode(data)
# write to the target stream
self.stream.write(data)
# empty queue
self.queue.truncate(0)
def writerows(self, rows):
for row in rows:
self.writerow(row)