python打印弧度值時：NameError: name 'pi' is not defined
報錯：NameError: name ‘pi’ is not defined 報錯原因：是因爲求弧度值時，pi沒有通過math來調用該方法 在python代碼中圓周率π【pi】是用math.pi表示的。 錯誤的代碼示例 正確的代碼示例
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