Am 15.03.14 17:26, schrieb Jayanth Koushik:
This is regarding the inbuilt 'complex' function. The python docs
say: "Note: When converting from a string, the string must not
contain whitespace around the central + or - operator. For example,
complex('1+2j') is fine, but complex('1 + 2j') raises ValueError."
It's funny that you ask this question exactly now; because I'm currently
implementing a compiler for a small language that understands complex
numbers. As others have explained, the basic issue is the question how
to parse an expression like
1+2i*3
is it "complex(1+2i) times 3" or is it sum of 1 and product of complex
2i and 3? The answer that python does it by parsing imaginary literals
and then combining them back using peephole optimization was helpful,
thanks for that!
Christian
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