使用python（py2neo）在neo4j中创建节点时出现UnicodeDecodeError答案

【问题标题】：UnicodeDecodeError while creating nodes in neo4j using python (py2neo)使用python（py2neo）在neo4j中创建节点时出现UnicodeDecodeError
【发布时间】：2016-01-01 16:21:54
【问题描述】：

嘿，我正在使用 python 中的 py2neo 包在 neo4j 中创建一组节点。一段类似的代码适用于另一组节点，但在这种情况下不起作用。

from py2neo import *
rf = open('dataset.txt','r')
sf = rf.read().split('\n')
rf.close()

L = []

for i in range(len(sf)):
    X = sf[i].split('\t')
    L.append(X)

for i in range(len(L)):
    L[i][0] = int(L[i][0])
    L[i][1] = int(L[i][1])
    L[i][4] = int(L[i][4])
    L[i][5] = float(L[i][5])
    L[i][6] = float(L[i][6])
    L[i][8] = float(L[i][8])
    L[i][9] = float(L[i][9])
    L[i][10] = float(L[i][10])
    L[i][19] = float(L[i][19])

def conGraph():
    authenticate("localhost:7474","neo4j","neo")
    graph = Graph("http://localhost:7474/db/data/")
    return graph

def createProducts():
    graph = conGraph()
    L1, L2, L3, L4, L5, L6 = [], [], [], [], [], []
    for i in range(len(L)):
        if L[i][17] not in L1:
            L1.append(L[i][17])
            L2.append(L[i][15])
            L3.append(L[i][16])
            L4.append(L[i][18])
            L5.append(float(L[i][9]))
        L6.append(float(L[i][19]))
for i in range(len(L1)):
    p = Node("Product", name = L1[i], category = L2[i], subcategory = L3[i], container = L4[i], unitprice = L5[i], basemargin = L6[i])
    graph.create(p)

createProducts()

只创建了第一个节点，然后出现以下错误：

Traceback (most recent call last):
  File "C:\Documents and Settings\Administrator\Desktop\AstroMite\lambda\test.py", line 44, in <module>
createProducts()
  File "C:\Documents and Settings\Administrator\Desktop\AstroMite\lambda\test.py", line 41, in createProducts
p = Node("Product", name = L1[i], category = L2[i], subcategory = L3[i], container = L4[i], unitprice = L5[i], basemargin = L6[i])
  File "C:\Python27\lib\site-packages\py2neo\core.py", line 1458, in __init__
PropertyContainer.__init__(self, **properties)
  File "C:\Python27\lib\site-packages\py2neo\core.py", line 1223, in __init__
self.__properties = PropertySet(properties)
  File "C:\Python27\lib\site-packages\py2neo\core.py", line 1110, in __init__
self.update(iterable, **kwargs)
  File "C:\Python27\lib\site-packages\py2neo\core.py", line 1168, in update
self[key] = value
  File "C:\Python27\lib\site-packages\py2neo\core.py", line 1139, in __setitem__
dict.__setitem__(self, key, cast_property(value))
  File "C:\Python27\lib\site-packages\py2neo\types.py", line 55, in cast_property
value = ustr(value)
  File "C:\Python27\lib\site-packages\py2neo\util.py", line 210, in ustr
return s.decode(encoding)
  File "C:\Python27\lib\encodings\utf_8.py", line 16, in decode
return codecs.utf_8_decode(input, errors, True)
UnicodeDecodeError: 'utf8' codec can't decode byte 0xae in position 8: invalid start byte

我搜索了相关问题，但没有找到任何具体答案。

【问题讨论】：

标签： python neo4j py2neo

【解决方案1】：

您的错误与 neo4j 或 py2neo 无关。您在阅读 dataset.txt 文件时遇到问题。

Python 假定文件是 utf-8 编码的，并尝试使用这种字符编码解码文件。它找到一个不是 utf-8 编码的字符，因此无法解码。

您的文件很可能不是 utf-8 编码的。所以你必须弄清楚字符编码，然后用例如打开文件：

f = open('dataset.txt', encoding = "ISO-8859-1")

UnicodeDecodeError: 'utf-8' codec can't decode byte error

UnicodeDecodeError: 'utf8' codec can't decode byte 0x9c

【讨论】：