I wrote this function convert hex strings to UInt256 and got an error. Can anyone help me fix it? fn to_UInt256(hex_string: String) raises -> UInt256: builtins = Python.import_module("builtins") return UInt256(builtins.int(hex_string, 16)) error: cannot implicitly convert 'SIMD[float64, 1]…

A UInt256 is an alias to SIMD[DType.uint256, 1]. And SIMD only has one constructor from a PythonObject, which returns a Float64 . So the PythonObject is implicitly converted to a Float64, but you can’t implicitly convert a Float64 to a UInt256, you’d have to cast it. Also it’s not wide enough if you…

Failed to convert hex string to UInt256

Mojo

duck_tape (Seth Stadick) June 5, 2025, 2:17pm 3

This is related to what Sora described in your other post: Failed to use Python hex() function in Mojo - #2 by sora

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Failed to use Python hex() function in Mojo Mojo	1	100	June 4, 2025
UInt256 returns wrong value Mojo	8	168	June 12, 2025
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Failed to convert hex string to UInt256

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