python3.6 import matplotlib pyparsing 包版本获取报错

python3.6 import matplotlib pyparsing 包版本获取报错 python3.6 import matplotlib报错信息如下：

File “D:python3.6Libsite-packagespyparsing_init_.py”, line 165, in

_version_ = __version_info__.__version__
AttributeError: ‘version_info’ object has no attribute ‘__version__’

pyparsing 版本3.0.6 matplotlib 版本3.3.4 解决过程方法：

根据报错信息，找到文件：“D:python3.6Libsite-packagespyparsing_init_.py”

版本信息获取类：

class version_info(NamedTuple):

major: int

minor: int

micro: int

releaselevel: str

serial: int

@property
def __version__(self):
    return "{}.{}.{}".format(self.major, self.minor, self.micro) + (
        "{}{}{}".format(
            "r" if self.releaselevel[0] == "c" else "",
            self.releaselevel[0],
            self.serial,
        ),
        "",
    )[self.releaselevel == "final"]

def __str__(self):
    return "{} {} / {}".format(__name__, self.__version__, __version_time__)

def __repr__(self):
    return "{}.{}({})".format(
        __name__,
        type(self).__name__,
        ", ".join("{}={!r}".format(*nv) for nv in zip(self._fields, self)),
    )

经测试后发现类参数定义方式python3.6无法识别,对该方法按以下内容修改:

class version_info():

def __init__(self,major:int,minor:int,micro:int,releaselevel:str,serial:int):   
    self.major = major
    self.minor = minor
    self.micro = micro
    self.releaselevel = releaselevel
    self.serial = serial
@property
def __version__(self):
    return "{}.{}.{}".format(self.major, self.minor, self.micro) + (
        "{}{}{}".format(
            "r" if self.releaselevel[0] == "c" else "",
            self.releaselevel[0],
            self.serial,
        ),
        "",
    )[self.releaselevel == "final"]
def __str__(self):
    return "{} {} / {}".format(__name__, self.__version__, __version_time__)
def __repr__(self):
    return "{}.{}({})".format(
        __name__,
        type(self).__name__,
        ", ".join("{}={!r}".format(*nv) for nv in zip(self._fields, self)),
    )

替换原来方法，报错解决！

import matplotlib.pyplot as plt

x=np.arange(0,5,0.1)

y=x*0.04761905-1.19047619

plt.plot(x,y)
plt.show()

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