Project

General

Profile

« Previous | Next » 

Revision 1046

Added by Aaron Marcuse-Kubitza almost 13 years ago

util.py: Fixed cast() to not cast a subclass to a superclass (which doesn't make sense in a dynamically-typed language). Added none_if().

View differences:

util.py
22 22 
            +check_func.__name__)
23 23 

  		




  24
  24
  
    
def cast(type_, val):


  		




  25
  
  
    
    '''Passes None through'''


  		




  26
  
  
    
    if val != None: val = type_(val)


  		




  
  25
  
    
    '''Passes None through. Does not cast a subclass to a superclass (which


  		




  
  26
  
    
    doesn't make sense in a dynamically-typed language).'''


  		




  
  27
  
    
    if val != None and not isinstance(val, type_): val = type_(val)


  		




  27
  28
  
    
    return val


  		




  28
  29
  
    

  		




  29
  30
  
    
def is_str(val): return isinstance(val, basestring)


  		




  30
  31
  
    

  		




  31
  32
  
    
def is_list(val): return isinstance(val, list)


  		




  32
  33
  
    

  		




  
  34
  
    
#### Basic types


  		




  
  35
  
    

  		




  
  36
  
    
def none_if(val, none_val):


  		




  
  37
  
    
    if cast(type(none_val), val) == none_val: return None


  		




  
  38
  
    
    else: return val


  		




  
  39
  
    

  		




  33
  40
  
    
#### Iterables


  		




  34
  41
  
    

  		




  35
  42
  
    
def first(iter_): return iter_.next()


  		












Also available in:  Unified diff