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96 lines
3.1 KiB
Python
96 lines
3.1 KiB
Python
"""Redo the `...` (representation) but with limits on most sizes."""
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__all__ = ["Repr","repr"]
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class Repr:
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def __init__(self):
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self.maxlevel = 6
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self.maxtuple = 6
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self.maxlist = 6
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self.maxdict = 4
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self.maxstring = 30
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self.maxlong = 40
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self.maxother = 20
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def repr(self, x):
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return self.repr1(x, self.maxlevel)
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def repr1(self, x, level):
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typename = type(x).__name__
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if ' ' in typename:
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parts = typename.split()
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typename = '_'.join(parts)
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if hasattr(self, 'repr_' + typename):
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return getattr(self, 'repr_' + typename)(x, level)
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else:
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s = `x`
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if len(s) > self.maxother:
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i = max(0, (self.maxother-3)//2)
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j = max(0, self.maxother-3-i)
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s = s[:i] + '...' + s[len(s)-j:]
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return s
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def repr_tuple(self, x, level):
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n = len(x)
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if n == 0: return '()'
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if level <= 0: return '(...)'
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s = ''
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for i in range(min(n, self.maxtuple)):
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if s: s = s + ', '
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s = s + self.repr1(x[i], level-1)
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if n > self.maxtuple: s = s + ', ...'
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elif n == 1: s = s + ','
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return '(' + s + ')'
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def repr_list(self, x, level):
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n = len(x)
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if n == 0: return '[]'
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if level <= 0: return '[...]'
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s = ''
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for i in range(min(n, self.maxlist)):
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if s: s = s + ', '
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s = s + self.repr1(x[i], level-1)
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if n > self.maxlist: s = s + ', ...'
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return '[' + s + ']'
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def repr_dictionary(self, x, level):
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n = len(x)
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if n == 0: return '{}'
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if level <= 0: return '{...}'
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s = ''
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keys = x.keys()
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keys.sort()
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for i in range(min(n, self.maxdict)):
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if s: s = s + ', '
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key = keys[i]
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s = s + self.repr1(key, level-1)
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s = s + ': ' + self.repr1(x[key], level-1)
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if n > self.maxdict: s = s + ', ...'
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return '{' + s + '}'
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def repr_str(self, x, level):
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s = `x[:self.maxstring]`
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if len(s) > self.maxstring:
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i = max(0, (self.maxstring-3)//2)
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j = max(0, self.maxstring-3-i)
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s = `x[:i] + x[len(x)-j:]`
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s = s[:i] + '...' + s[len(s)-j:]
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return s
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def repr_long(self, x, level):
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s = `x` # XXX Hope this isn't too slow...
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if len(s) > self.maxlong:
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i = max(0, (self.maxlong-3)//2)
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j = max(0, self.maxlong-3-i)
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s = s[:i] + '...' + s[len(s)-j:]
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return s
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def repr_instance(self, x, level):
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try:
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s = `x`
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# Bugs in x.__repr__() can cause arbitrary
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# exceptions -- then make up something
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except:
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return '<' + x.__class__.__name__ + ' instance at ' + \
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hex(id(x))[2:] + '>'
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if len(s) > self.maxstring:
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i = max(0, (self.maxstring-3)//2)
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j = max(0, self.maxstring-3-i)
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s = s[:i] + '...' + s[len(s)-j:]
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return s
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aRepr = Repr()
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repr = aRepr.repr
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