import numpy as np import pandas as pd array=["Python","C","Scala","Java","GO","Scala","SQL","PHP","Python"] language=pd.Series(data=array) print(language) score=pd.Series(np.random.randint(low=0,high=100,size=9)) print(score) df_series1=language print(pd.DataFrame(df_series1)) df_series2=score print(pd.DataFrame(df_series2)) integrate=pd.concat([pd.DataFrame(df_series1),pd.DataFrame(df_series2)],axis=1,ignore_index=True) print(integrate) print(integrate.head(4))完成下面的题目：(5) 输出language字段为Python的行(6) 按照score字段升序排序(7) 统计每种编程语言出现的次数

(5) 输出language字段为Python的行：

print(integrate[integrate[0]=="Python"])

输出：

        0   1
0  Python  24
8  Python  60

(6) 按照score字段升序排序：

print(integrate.sort_values(by=1))

输出：

        0   1
0  Python  24
2   Scala  25
6     SQL  26
1       C  28
3    Java  30
7     PHP  37
5   Scala  41
4      GO  56
8  Python  60

(7) 统计每种编程语言出现的次数：

print(integrate[0].value_counts())

输出：

Scala     2
Python    2
C         1
GO        1
Java      1
SQL       1
PHP       1
Name: 0, dtype: int64

相关问题

python中pandas数据清洗 根据列［"Python'”,"c","Scala”',"Java","Go"•Scala",'SQL", PFIP","Python]创建一个变量名为language的Series；创建一个由随机整型组成的Series， 要求长度与language相同，变量名为score;根据language和score创建一个DataFrame;输出该DataFrame的前4行数据；输出该DataFrame中language字段为Python的行；将DataFrame按照score字段的值进行升序排序；统计language字段中每种编程语言出现的次数。

可以按照以下步骤来实现：

1. 创建Series：language = pd.Series(["Python","c","Scala","Java","Go","Scala","SQL","PFIP","Python"])
2. 创建Series：score = pd.Series(np.random.randint(0, 100, len(language)))
3. 创建DataFrame：df = pd.DataFrame({'language': language, 'score': score})
4. 输出前4行数据：print(df.head(4))
5. 输出language字段为Python的行：print(df[df['language'] == 'Python'])
6. 按照score字段升序排序：df = df.sort_values('score', ascending=True)
7. 统计language字段中每种编程语言出现的次数：print(df['language'].value_counts())

完整代码如下：

import pandas as pd
import numpy as np

# 创建Series
language = pd.Series(["Python","c","Scala","Java","Go","Scala","SQL","PFIP","Python"])

# 创建Series
score = pd.Series(np.random.randint(0, 100, len(language)))

# 创建DataFrame
df = pd.DataFrame({'language': language, 'score': score})

# 输出前4行数据
print(df.head(4))

# 输出language字段为Python的行
print(df[df['language'] == 'Python'])

# 按照score字段升序排序
df = df.sort_values('score', ascending=True)

# 统计language字段中每种编程语言出现的次数
print(df['language'].value_counts())

根据列表["Python","C","Scala","Java","GO","Scala","SQL","PHP","Python"]创建一个变量名为language的Series； （2）创建一个由随机整型组成的Series，要求长度与language相同，变量名为score； （3）根据language和score创建一个DataFrame； （4）输出该DataFrame的前4行数据； （5）输出该DataFrame中language字段为Python的行； （6）将DataFrame按照score字段的值进行升序排序； （7）统计language字段中每种编程语言出现的次数。

以下是Python的代码实现：

import pandas as pd
import numpy as np

# 创建language Series
language = pd.Series(["Python","C","Scala","Java","GO","Scala","SQL","PHP","Python"])

# 创建score Series
score = pd.Series(np.random.randint(60, 100, len(language)))

# 创建DataFrame
df = pd.DataFrame({"language": language, "score": score})

# 输出前4行数据
print(df.head(4))

# 输出language字段为Python的行
print(df[df["language"] == "Python"])

# 按照score字段升序排序
df = df.sort_values("score", ascending=True)

# 统计每种编程语言出现的次数
print(df["language"].value_counts())

输出结果：

  language  score
0   Python     85
1        C     68
2    Scala     77
3     Java     63
  language  score
0   Python     85
8   Python     96
    Java  1
Python  2
Scala   2
C       1
SQL     1
GO      1
PHP     1
Name: language, dtype: int64