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class NamedNumbers(object):
"""Base for Enum and Flags."""
def __init__(self, value):
self.value = value
def __int__(self):
"""
>>> n = NamedNumbers(42)
>>> int(n)
42
"""
return self.value
class Enum(NamedNumbers):
"""Enumeration."""
def __str__(self):
"""
>>> class Foo(Enum):
... ONE = 1
... TWO = 2
>>> Foo.ONE
1
>>> str(Foo(Foo.TWO))
'TWO'
>>> str(Foo(3))
'3'
"""
for n, v in self.__class__.__dict__.iteritems():
if v == self.value:
return n
return str(self.value)
# TODO __repr__
class Flags(NamedNumbers):
"""Bit flags."""
def __str__(self):
"""
>>> class MyFlags(Flags):
... NONE = 0x0
... EXECUTE = 0x1
... WRITE = 0x2
... READ = 0x4
>>> str(MyFlags(5))
'EXECUTE,READ'
>>> str(MyFlags(0))
'NONE'
>>> str(MyFlags(9)) # doctest: +SKIP
'EXECUTE,0x8'
"""
has = {}
for n, v in self.__class__.__dict__.iteritems():
if isinstance(v, int): # FIXME long
if self.value & v or (self.value == 0 and v == 0):
has[v] = n
names = [has[v] for v in sorted(has.keys())]
# TODO unknown values?
return ",".join(names)
class Table(object):
"""Formats a table
>>> t = Table("A", "Bee", "C")
>>> t.row("ay", "B", "sea")
>>> t.row("", "b", "c")
>>> print t
A | Bee | C
---+-----+----
ay | B | sea
| b | c
>>> Table.terse = True
>>> print t
ay|B|sea
|b|c
"""
# there are trailing spaces in the above non-terse printout
terse = False
"No headings and no padding, suitable for parsing."
def __init__(self, *args):
"The arguments are column headings."
self.headings = args
self.rows = []
@staticmethod
def from_items(obj, *items):
t = Table("Property", "Value")
for i in items:
t.row(i, obj[i])
return t
@staticmethod
def from_nested_dict(dd):
t = Table("Section", "Property", "Value")
for s, d in dd.iteritems():
t.row(s, "", "")
for k, v in d.iteritems():
if isinstance(v, list):
v = ", ".join(v)
t.row("", k, v)
return t
def row(self, *args):
"""The arguments are row items.
str is applied to them"""
self.rows.append(map(str,args))
@staticmethod
def pad_row(row, col_sizes):
return map(str.ljust, row, col_sizes)
def col_widths(self):
"Returns a list of the column widths."
# the table of lengths of original items
lengths = map(lambda cells: map(len, cells), self.rows + [self.headings])
return reduce(lambda cells1, cells2: map(max, cells1, cells2), lengths)
def terse_str(self):
"Formats the table, tersely."
rs = map("|".join, self.rows)
return "\n".join(rs)
def __str__(self):
"Formats the table."
if self.terse:
return self.terse_str()
cw = self.col_widths()
def fmt_row(items):
return " | ".join(self.pad_row(items, cw))
h = fmt_row(self.headings)
s = "-+-".join(map(lambda w: "-" * w, cw))
rs = map(fmt_row, self.rows)
rs.insert(0, s)
rs.insert(0, h)
return "\n".join(rs)
if __name__ == "__main__":
import doctest
doctest.testmod()
|
