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29 lines
1.1 KiB
29 lines
1.1 KiB
"""Evalues a tcl expr expression."""
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import math
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def expr(caller_globals_dict, caller_localvars_dict, arguments):
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"""the arguments to expr in tcl are passed as individual arguments to this
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method.
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eg [expr sin(20)*$a] becomes expr.expr("sin","(","20",")","*", a)"""
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eval_str = "eval(\"\"\""
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for arg in arguments:
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if arg in caller_localvars_dict.keys():
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#arg is a local variable. First, get its value
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arg = caller_localvars_dict[arg]
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if type(arg) == type("string"):
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#this will obtain value in the variable.
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if arg in dir(math):
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eval_str += "math.%s" % arg
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else:
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if arg == "(":
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eval_str += arg
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else:
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if arg.strip() == "double":
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arg = "float" #tcl double is python float
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eval_str += " " + arg
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continue
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eval_str += " " + `arg`
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eval_str += "\"\"\")"
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#print "eval_str : %s" % eval_str
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return eval(eval_str, caller_globals_dict, caller_localvars_dict)
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