当你遇到 NameError: name 'random' is not defined 这个错误时,它通常意味着Python解释器在你的代码中找不到名为 random 的标识符。这个错误常见于以下几种情况: 1. 未导入 random 模块 最常见的原因是代码中没有导入Python的 random 模块。要解决这个问题,你需要在代码的开始处添加 import random 语句。以下是...
If you are working with Python and trying to use the random library, you may encounter the “NameError: name ‘random’ is not defined” error. In this tutorial, we will explore why this error occurs and the steps required to fix it such that your Python code can successfully run without...
27. ValueError: Sample larger than population or is negative import random a = [1, 2, 3, 4, 5] s = random.sample(a, 6) # 采样数据太多,多于总的数据。 print(a) 在使用随机库的时候,用它的采样函数,上面的例子采样数目多于总体的数目,因此报错。可以调整采样数目改正错误。 import random a =...
from pygame.locals import * from random import randint,choice global screen_size screen_size=800 global r_color r_color=(0,0,0) class room(object) def __init__(self,x,y) self.x=x self.y=y self.wells=[True,True,True,True] self.size=10 #self.visited=False def visited(self) ...
(i) If a sample is selected using random sampling, it will be free from bias. (ii) A sampling frame is a numbered list of all items in a sample. (iii) In cluster sampling there is very little potential for bias. (iv) In quota sampling, investigators are told to interview all the ...
Error NameError: name 'np' is not defined [closed]回答1As @aydow says, "change from numpy import * to import numpy as np": import numpy as np ... Or don't write np: from numpy import * x = random.randint(low=10, high=30, size=6) ... Because, from numpy import *, Import...
可是執行後出現NameError: name 'self' is not defined error highlight 處在最後一行 prtn_global_config () 請教我該修改哪個部分呢? 謝謝. PS. 我使用 Sublime, python 3.6.8 importloggingimportsysimportrandomimporttimeimportdatetimeclassTEST:defprtn_info(self,msg):print(str(datetime.datetime.now())...
NameError: name 'encode' is not defined是什么问题conn.send(str(random.randint(1,1000)),encode()) 慕先生7107772 2019-05-29源自:python运维-Socket网络编程 2-3 关注问题 我要回答 7383 分享 操作 收起 3 回答Mr_Zhang1 2019-08-25 不是,encode(),是.encode() 0 回复 慕婉清3056238 2019-...
完美解决丨#在python中，如果引用的变量未定义，则会报告NameError: name ‘变量名‘ is not defined。
Case 4: Name is not defined error in Python in calling functions without importing module. When we try to use the function from a module and forget to import the module before, Python raisesNameError. Here is an instance: city = random.randint(4, 12) ...