python安装包问题小结

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C:\>G:

G:\>cd G:\software\Program software\Python\python insert\Scripts

G:\software\Program software\Python\python insert\Scripts>pip install G:\numpy+s

cipy+matplotlib\numpy-1.10.2-cp27-none-win_amd64.whl

Processing g:\numpy+scipy+matplotlib\numpy-1.10.2-cp27-none-win_amd64.whl

Installing collected packages: numpy

Successfully installed numpy-1.10.2

G:\software\Program software\Python\python insert\Scripts>pip install G:\numpy+s

cipy+matplotlib\matplotlib-1.5.0-cp27-none-win_amd64.whl

Installing collected packages: matplotlib

Successfully installed matplotlib-1.5.0

G:\software\Program software\Python\python insert\Scripts>pip install G:\numpy+s

cipy+matplotlib\scipy-0.16.1-cp27-none-win_amd64.whl

Processing g:\numpy+scipy+matplotlib\scipy-0.16.1-cp27-none-win_amd64.whl

Installing collected packages: scipy

Successfully installed scipy-0.16.1

G:\software\Program software\Python\python insert\Scripts>pip install G:\numpy+s

cipy+matplotlib\scikit_learn-0.17-cp27-none-win_amd64.whl

Processing g:\numpy+scipy+matplotlib\scikit_learn-0.17-cp27-none-win_amd64.whl

Installing collected packages: scikit-learn

Successfully installed scikit-learn-0.17

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import matplotlib

import numpy

import scipy

import matplotlib.pyplot as plt

plt.plot([1,2,3])

plt.ylabel(‘some numbers‘)

plt.show()

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import numpy as np

import matplotlib.pyplot as plt

X = np.arange(-5.0, 5.0, 0.1)

Y = np.arange(-5.0, 5.0, 0.1)

x, y = np.meshgrid(X, Y)

f = 17 * x ** 2 - 16 * np.abs(x) * y + 17 * y ** 2 - 225

fig = plt.figure()

cs = plt.contour(x, y, f, 0, colors = ‘r‘)

plt.show()

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import numpy as np

import matplotlib.pyplot as plt

N = 5

menMeans = (20, 35, 30, 35, 27)

menStd =   (2, 3, 4, 1, 2)

ind = np.arange(N)  # the x locations for the groups

width = 0.35        # the width of the bars

fig, ax = plt.subplots()

rects1 = ax.bar(ind, menMeans, width, color=‘r‘, yerr=menStd)

womenMeans = (25, 32, 34, 20, 25)

womenStd =   (3, 5, 2, 3, 3)

rects2 = ax.bar(ind+width, womenMeans, width, color=‘y‘, yerr=womenStd)

# add some

ax.set_ylabel(‘Scores‘)

ax.set_title(‘Scores by group and gender‘)

ax.set_xticks(ind+width)

ax.set_xticklabels( (‘G1‘, ‘G2‘, ‘G3‘, ‘G4‘, ‘G5‘) )

ax.legend( (rects1[0], rects2[0]), (‘Men‘, ‘Women‘) )

def autolabel(rects):

    # attach some text labels

    for rect in rects:

        height = rect.get_height()

        ax.text(rect.get_x()+rect.get_width()/2., 1.05*height, ‘%d‘%int(height),

                ha=‘center‘, va=‘bottom‘)

autolabel(rects1)

autolabel(rects2)

plt.show()

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from sklearn import datasets

iris = datasets.load_iris()

digits = datasets.load_digits()

print digits.data

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# coding:utf-8

__author__ = "liuxuejiang"

import jieba

import jieba.posseg as pseg

import os

import sys

from sklearn import feature_extraction

from sklearn.feature_extraction.text import TfidfTransformer

from sklearn.feature_extraction.text import CountVectorizer

if __name__ == "__main__":

    corpus=["我 来到 北京 清华大学",     #第一类文本切词后的结果 词之间以空格隔开

        "他 来到 了 网易 杭研 大厦",     #第二类文本的切词结果

        "小明 硕士 毕业 与 中国 科学院",  #第三类文本的切词结果

        "我 爱 北京 天安门"]            #第四类文本的切词结果

    #该类会将文本中的词语转换为词频矩阵，矩阵元素a[i][j] 表示j词在i类文本下的词频

    vectorizer=CountVectorizer()

    #该类会统计每个词语的tf-idf权值

    transformer=TfidfTransformer()

    #第一个fit_transform是计算tf-idf，第二个fit_transform是将文本转为词频矩阵

    tfidf=transformer.fit_transform(vectorizer.fit_transform(corpus))

    #获取词袋模型中的所有词语

    word=vectorizer.get_feature_names()

    #将tf-idf矩阵抽取出来，元素a[i][j]表示j词在i类文本中的tf-idf权重

    weight=tfidf.toarray()

    #打印每类文本的tf-idf词语权重，第一个for遍历所有文本，第二个for便利某一类文本下的词语权重

    for i in range(len(weight)):

        print u"-------这里输出第",i,u"类文本的词语tf-idf权重------"

        for j in range(len(word)):

            print word[j],weight[i][j]

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* pip install numpy             --安装包numpy

* pip uninstall numpy           --卸载包numpy

* pip show --files PackageName  --查看已安装包

* pip list outdated             --查看待更新包信息

* pip install --upgrade numpy   --升级包

* pip install -U PackageName    --升级包

* pip search PackageName        --搜索包

* pip help                      --显示帮助信息