Python 中常见错误总结

IndentationError: unexpected indent

Python 中强制缩进，，  IndentationError: unexpected indent   缩进错误

这类错误非常常见，一般都是由于tab在不同的平台上占用长度不同导致，有些事程序员自己直接使用空格或其他来顶替tab。

解决办法非常简单，在所在平台上使用标准的tab进行缩进，就OK了。

UnicodeDecodeError: 'gbk' codec can't decode byte 0x80 in position 106: illegal multibyte sequence

编码错误，可以通过指定字符集解决 ： encoding = “utf-8”

io.UnsupportedOperation: not readable

 文件不可读，可能是文件打开模式不对

UnboundLocalError: local variable 'a' referenced before assignment

局部作用域引用错误，可能原因是 a变量为局部变量，未定义，不可修改

no module named wx

缺少wx模块，缺啥装啥...

sudo apt-get install python-wxtools

SystemError: cannot compile ‘Python.h’

没法解析Python的头文件，解决方法:

#先更新下源

sudo apt-get update

#安装python-dev

sudo apt-get install python-dev

NameError: name ‘xrange’ is not defined

python版本问题，不兼容，python3版本的换成range()函数就行了。

ameError: global name ‘time’ is not defined

解决方法：import time

NameError: global name ‘datetime’ is not defined

解决方法： from datetime import datetime

typeError: not all arguments converted during string formatting

TypeError: load() got an unexpected keyword argument 'delimiter'

UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 33: invalid start byte

编码错误，基本是由中文引起的（中文路径、中文编码）

ImportError: cannot import name 'Flask'

原因之一：当前路径名取了一个“ flask ”（当前文件名为flask）

AttributeError: 'dict' object has no attribute 'has_key'

Python3以后删除了has_key()方法！python2中可以。

解决方法：

if adict.has_key(key1):

#改为

if key1 in adict:

bs4.FeatureNotFound: Couldn't find a tree builder with the features you requested: lxml. Do you need to install a parser library?

TypeError: object of type 'map' has no len()

ZeroDivisionError: float division by zero

map函数后返回<map object at 0x000001D8259F95F8>

map(function, iterable, ......)

Python 2.x 返回列表。

Python 3.x 返回迭代器。只用将iterator 转换成 list 即可，比如 list(map())

TypeError: 'int' object is not iterable

不能直接用int进行迭代

参考：https://segmentfault.com/q/1010000011234516，https://blog.csdn.net/yeizisn/article/details/53069775

报错代码：

list(map(frozenset, C1)) # 对每一个元素 frozenset

问题在于：map这个函数的第二个参数要求可以迭代，C1里面的元素也得可以迭代。C1这个列表的每个元素都是int，不可迭代，应该也是list才行；

http://www.runoob.com/python/python-func-map.html

解决代码：

C1.append([item])  #注意！！！item一定要加中括号，代表列表； 不然C1的元素是int，int是不可迭代的；执行list(map(frozenset, C1))会报错。

_tkinter.TclError: unknown option "-lable"

一般是参数的名称出现错误

TypeError: select_algorithm() takes 0 positional arguments but 1 was given

错误出现在tkinter，为combobox添加选择事件

解决方法：为函数添加参数*args

def select_algorithm(*args):   #为函数添加参数*args

    global  algo_selected

    algo_selected = algorithm_combobox.get()

    print(algo_selected)

ModuleNotFoundError: No module named 'cPickle'

原因：python2有cPickle，但是在python3下，是没有cPickle的；

解决办法：将cPickle改为pickle即可

TypeError: getOpenFileName(parent: QWidget = None, caption: object = '', directory: object = '', filter: object = '', options: QFileDialog.Options = 0): argument 1 has unexpected type 'str'

# argument 1 是指第一个参数

# 它的意思是第一个参数不应该是str，所以查一下这个函数的几个参数就好了

# 其实是因为缺少第一个参数

filename = QFileDialog.getOpenFileName(None, 'Open File','/')  #第三个参数是默认打开路径，如果为空则打开当前路径

No module named 'sklearn.lda'

#  from sklearn.lda import LDA 这是sklearn0.16的写法，之后的版本没有了lda  可以查一下sklearn各个版本的API

#  参考链接： https://stackoverflow.com/questions/46775155/no-module-named-sklearn-lda

#  为了代码的最少更改，可以如下解决：

from sklearn.discriminant_analysis import LinearDiscriminantAnalysis as LDA

ValueError: too many values to unpack

#   参考链接：http://leonzhan.iteye.com/blog/1720315

#   上述链接中说：这种错误是指一个tuple值赋给一个tuple变量时，变量个数不够造成的。如：

#   a, b = (1, 2, 3)

#   我的错误代码：

    X, y = FileOpener.load_file(filename)

#   这里的问题是: load_file返回了三个值 X, y, dataset， 所以再加一个值来接收，改为如下代码：

    X, y，dataset = FileOpener.load_file(filename)

未完待续...................................................................................................................................................................................................................................................................................

巴特西

Python 中常见错误总结

IndentationError: unexpected indent

UnicodeDecodeError: 'gbk' codec can't decode byte 0x80 in position 106: illegal multibyte sequence

io.UnsupportedOperation: not readable

UnboundLocalError: local variable 'a' referenced before assignment

no module named wx

SystemError: cannot compile ‘Python.h’

NameError: name ‘xrange’ is not defined

ameError: global name ‘time’ is not defined

NameError: global name ‘datetime’ is not defined

typeError: not all arguments converted during string formatting

TypeError: load() got an unexpected keyword argument 'delimiter'

UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 33: invalid start byte

ImportError: cannot import name 'Flask'

AttributeError: 'dict' object has no attribute 'has_key'

bs4.FeatureNotFound: Couldn't find a tree builder with the features you requested: lxml. Do you need to install a parser library?

TypeError: object of type 'map' has no len()

ZeroDivisionError: float division by zero

map函数后返回<map object at 0x000001D8259F95F8>

TypeError: 'int' object is not iterable

_tkinter.TclError: unknown option "-lable"

TypeError: select_algorithm() takes 0 positional arguments but 1 was given

ModuleNotFoundError: No module named 'cPickle'

TypeError: getOpenFileName(parent: QWidget = None, caption: object = '', directory: object = '', filter: object = '', options: QFileDialog.Options = 0): argument 1 has unexpected type 'str'

No module named 'sklearn.lda'

ValueError: too many values to unpack

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巴特西

Python 中常见错误总结

IndentationError: unexpected indent

UnicodeDecodeError: 'gbk' codec can't decode byte 0x80 in position 106: illegal multibyte sequence

io.UnsupportedOperation: not readable

UnboundLocalError: local variable 'a' referenced before assignment

no module named wx

SystemError: cannot compile ‘Python.h’

NameError: name ‘xrange’ is not defined

ameError: global name ‘time’ is not defined

NameError: global name ‘datetime’ is not defined

typeError: not all arguments converted during string formatting

TypeError: load() got an unexpected keyword argument 'delimiter'

UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb6 in position 33: invalid start byte

ImportError: cannot import name 'Flask'

AttributeError: 'dict' object has no attribute 'has_key'

bs4.FeatureNotFound: Couldn't find a tree builder with the features you requested: lxml. Do you need to install a parser library?

TypeError: object of type 'map' has no len()

ZeroDivisionError: float division by zero

map函数后 返回<map object at 0x000001D8259F95F8>

TypeError: 'int' object is not iterable

_tkinter.TclError: unknown option "-lable"

TypeError: select_algorithm() takes 0 positional arguments but 1 was given

ModuleNotFoundError: No module named 'cPickle'

TypeError: getOpenFileName(parent: QWidget = None, caption: object = '', directory: object = '', filter: object = '', options: QFileDialog.Options = 0): argument 1 has unexpected type 'str'

No module named 'sklearn.lda'

ValueError: too many values to unpack

最新文章

热门文章

map函数后返回<map object at 0x000001D8259F95F8>