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[英]Why do I keep getting the error “AttributeError: '_io.TextIOWrapper' object has no attribute 'writerows” when using csv module?
[英]Why do I keep getting AttributeError: 'module' object has no attribute
我是Python的新手,正在尝试一些问题。 这是创建一个交通信号灯。 不知道为什么我不断收到此错误AttributeError:'模块'对象没有属性'画布'
下面的代码
import tkinter as tk
class TrafficLight(tk.Frame):
def __init__(self, parent=None):
tk.Frame.__init__(self, parent, bg='green')
self.grid()
# create a canvas to draw on
self.canvas = tk.canvas(self, width=260, height=280, bg='white')
self.canvas.grid()
self.make_widgets()
def make_widgets(self):
self.canvas.create_rectangle(80, 20, 170, 260)
#imagine a square box
# upper left corner coordinates x1, y1
# lower right corner coordinates x2, y2
# and sides of length span for each circle
span = 50
x1 = 100
y1 = 50
x2 = x1 + span
y2 = y1 + span
self.canvas.create_oval(x1, y1, x2, y2, fill='red')
self.canvas.create_oval(x1, y1+70, x1, y2+70, fill='yellow')
self.canvas.create_oval(x1, y1+140, x2, y2+140, fill='green')
if __name__ == '__main__':
light = TrafficLight()
light.mainloop()
Python区分大小写。
>>> import tkinter as tk
>>> tk.canvas
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
AttributeError: 'module' object has no attribute 'canvas'
>>> tk.Canvas
<class 'tkinter.Canvas'>
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