CODEWITHSUNDEEP
pythonpychart
wangling
wangling

Reputation: 459

AttributeError: 'NoneType' object has no attribute 'show'

I want to get a PDF file, but I get an error: AttributeError: 'NoneType' object has no attribute 'show'. The error says that can doesn't have the attribute show. Why? As you can see, I import show from pychart.canvas.

from pychart import *
from pychart.canvas import show
can = canvas.init("pic.pdf")
x, y = (100, 500)

def show_text(str):
    global x, y
    can.show(x, y, str)
    can.show(x + 200, y, "/12/C" + font.quotemeta(str))
    y -= 20

show_text("/12/hLLeft align")
show_text("/12/hRRight align")
show_text("/12/hCCenter align")
show_text("/a20/12/hRAngled text")

def show_textv(str):
    global x, y
    can.show(x, y, str)
    x += 150

y -= 40
x = 100
show_textv("/12/vT//12//vTTop align")
show_textv("/12/vM//12//vT/12Middle align")
show_textv("/12/vB//12//vT/12Bottom align")

y -= 40
x = 100
show_text("/16/HHelvetica")
show_text("/12/CCourier")
show_text("/12/NHelvetica-Narrow")
show_text("/12/PPalatino-Roman")
show_text("/12/AAvantgarde")
show_text("/12/T/iTimes-Italic")
show_text("/12/F{ZapfDingbats}ZapfDingbats")

Upvotes: 1

Views: 3582

Answers (1)

Arseniy
Arseniy

Reputation: 1778

NoneType is type of None object. When can == None and you call following:

can.show(x, y, str)

you actually call None.show(x, y, str) and get AttributeError, because None doesn't have 'show' attribute

To fix your problem try to investigate why can == None

Upvotes: 0

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