csv is a module again

Lib/csv/__init__.py

-from csv import *

Lib/csv/csv.py

-from _csv import Error, __version__, writer, reader, register_dialect, \
-                 unregister_dialect, get_dialect, list_dialects, \
-                 QUOTE_MINIMAL, QUOTE_ALL, QUOTE_NONNUMERIC, QUOTE_NONE, \
-                 __doc__
-
-__all__ = [ "QUOTE_MINIMAL", "QUOTE_ALL", "QUOTE_NONNUMERIC", "QUOTE_NONE",
-            "Error", "Dialect", "excel", "excel_tab", "reader", "writer",
-            "register_dialect", "get_dialect", "list_dialects",
-            "unregister_dialect", "__version__", "DictReader", "DictWriter" ]
-
-class Dialect:
-    _name = ""
-    _valid = False
-    # placeholders
-    delimiter = None
-    quotechar = None
-    escapechar = None
-    doublequote = None
-    skipinitialspace = None
-    lineterminator = None
-    quoting = None
-
-    def __init__(self):
-        if self.__class__ != Dialect:
-            self._valid = True
-        errors = self._validate()
-        if errors != []:
-            raise Error, "Dialect did not validate: %s" % ", ".join(errors)
-
-    def _validate(self):
-        errors = []
-        if not self._valid:
-            errors.append("can't directly instantiate Dialect class")
-
-        if self.delimiter is None:
-            errors.append("delimiter character not set")
-        elif (not isinstance(self.delimiter, str) or
-              len(self.delimiter) > 1):
-            errors.append("delimiter must be one-character string")
-
-        if self.quotechar is None:
-            if self.quoting != QUOTE_NONE:
-                errors.append("quotechar not set")
-        elif (not isinstance(self.quotechar, str) or
-              len(self.quotechar) > 1):
-            errors.append("quotechar must be one-character string")
-
-        if self.lineterminator is None:
-            errors.append("lineterminator not set")
-        elif not isinstance(self.lineterminator, str):
-            errors.append("lineterminator must be a string")
-
-        if self.doublequote not in (True, False):
-            errors.append("doublequote parameter must be True or False")
-
-        if self.skipinitialspace not in (True, False):
-            errors.append("skipinitialspace parameter must be True or False")
-
-        if self.quoting is None:
-            errors.append("quoting parameter not set")
-
-        if self.quoting is QUOTE_NONE:
-            if (not isinstance(self.escapechar, (unicode, str)) or
-                len(self.escapechar) > 1):
-                errors.append("escapechar must be a one-character string or unicode object")
-
-        return errors
-
-class excel(Dialect):
-    delimiter = ','
-    quotechar = '"'
-    doublequote = True
-    skipinitialspace = False
-    lineterminator = '\r\n'
-    quoting = QUOTE_MINIMAL
-register_dialect("excel", excel)
-
-class excel_tab(excel):
-    delimiter = '\t'
-register_dialect("excel-tab", excel_tab)
-
-
-class DictReader:
-    def __init__(self, f, fieldnames, restkey=None, restval=None,
-                 dialect="excel", *args):
-        self.fieldnames = fieldnames    # list of keys for the dict
-        self.restkey = restkey          # key to catch long rows
-        self.restval = restval          # default value for short rows
-        self.reader = reader(f, dialect, *args)
-
-    def __iter__(self):
-        return self
-
-    def next(self):
-        row = self.reader.next()
-        # unlike the basic reader, we prefer not to return blanks,
-        # because we will typically wind up with a dict full of None
-        # values
-        while row == []:
-            row = self.reader.next()
-        d = dict(zip(self.fieldnames, row))
-        lf = len(self.fieldnames)
-        lr = len(row)
-        if lf < lr:
-            d[self.restkey] = row[lf:]
-        elif lf > lr:
-            for key in self.fieldnames[lr:]:
-                d[key] = self.restval
-        return d
-
-
-class DictWriter:
-    def __init__(self, f, fieldnames, restval="", extrasaction="raise",
-                 dialect="excel", *args):
-        self.fieldnames = fieldnames    # list of keys for the dict
-        self.restval = restval          # for writing short dicts
-        if extrasaction.lower() not in ("raise", "ignore"):
-            raise ValueError, \
-                  ("extrasaction (%s) must be 'raise' or 'ignore'" %
-                   extrasaction)
-        self.extrasaction = extrasaction
-        self.writer = writer(f, dialect, *args)
-
-    def _dict_to_list(self, rowdict):
-        if self.extrasaction == "raise":
-            for k in rowdict.keys():
-                if k not in self.fieldnames:
-                    raise ValueError, "dict contains fields not in fieldnames"
-        return [rowdict.get(key, self.restval) for key in self.fieldnames]
-
-    def writerow(self, rowdict):
-        return self.writer.writerow(self._dict_to_list(rowdict))
-
-    def writerows(self, rowdicts):
-        rows = []
-        for rowdict in rowdicts:
-            rows.append(self._dict_to_list(rowdict))
-        return self.writer.writerows(rows)