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3 examples of 'python check if variable is defined' in Python

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RyanMaugin/Tachyon
153def does_var_exist(self, name):
154    """ Check to see if a variable exists 
155
156    This will perform semantical analysis by checking if a dclared variable already exists
157
158    Args:
159        name (str) : The name of the variable to check
160    Return:
161        bool :       'True' if it already exists and 'False' if it doesn't 
162    """
163    for x in self.symbol_tree:
164        if x[0] == name: return True
165    return False
DonJayamanne/pythonVSCode
215def check(name):
216    if isinstance(name, ModuleName):
217        return False
218    return name.api_type == 'module'
mozilla/dxr
50def test_variable(self):
51    """Try searching for variable declarations."""
52    self.found_lines_eq('var-decl:x', [
53        ('extern int <b>x</b>;', 2),
54        ('extern int <b>x</b>;', 6)])

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