Vladislav Yegorov AT-19

classwork.py

@@ -0,0 +1,66 @@
+import sqlite3
+import pandas as pd
+import matplotlib.pyplot as plt
+import numpy as np
+
+
+con = sqlite3.connect('works.sqlite')
+cursor = con.cursor()
+cursor.execute('drop table if exists works')
+cursor.execute('create table works ('
+               'ID INTEGER PRIMARY KEY AUTOINCREMENT,'
+               'salary INTEGER,'
+               'educationType TEXT,'
+               'jobTitle TEXT,'
+               'qualification TEXT,'
+               'gender TEXT,'
+               'dateModify TEXT,'
+               'skills TEXT,'
+               'otherInfo TEXT)')
+con.commit()
+
+df = pd.read_csv("works.csv")
+df.to_sql("works", con, if_exists='append', index=False)
+con.commit()
+
+cursor.execute('create index salary_index on works (salary)')
+con.commit()
+cursor.execute('SELECT COUNT(*) FROM works')
+print(cursor.fetchall()[0][0])
+
+cursor.execute("SELECT COUNT(*) FROM works WHERE gender = 'Мужской'")
+print(cursor.fetchall()[0][0])
+
+cursor.execute("SELECT COUNT(*) FROM works WHERE gender = 'Женский'")
+print(cursor.fetchall()[0][0])
+
+cursor.execute("SELECT gender, COUNT(*) FROM works group by gender")
+print(cursor.fetchall())
+
+cursor.execute("SELECT COUNT(*) FROM works WHERE skills NOT NULL")
+print(cursor.fetchall()[0][0])
+
+cursor.execute("SELECT skills FROM works WHERE skills NOT NULL")
+print(cursor.fetchall())
+
+cursor.execute("SELECT salary FROM works WHERE skills LIKE '%Python%'")
+print(cursor.fetchall())
+
+
+cursor.execute("SELECT salary FROM works WHERE gender = 'Мужской'")
+m_salary = [t[0] for t in cursor.fetchall()]
+# print(m_salary)
+
+cursor.execute("SELECT salary FROM works WHERE gender = 'Женский'")
+w_salary = [t[0] for t in cursor.fetchall()]
+# print(w_salary)
+
+
+m_salary = np.quantile(m_salary, np.linspace(0.1, 1, 10))
+w_salary = np.quantile(w_salary, np.linspace(0.1, 1, 10))
+
+plt.plot(np.linspace(0.1, 1, 10), m_salary)
+plt.plot(np.linspace(0.1, 1, 10), w_salary)
+plt.xlabel("Перцентили")
+plt.ylabel("Зарплата")
+plt.show()

homework.py

@@ -0,0 +1,64 @@
+import sqlite3
+import pandas as pd
+import re
+
+
+def remove_tags(field):
+    return re.sub(r'\<[^>]*\>', '', str(field))
+
+
+con = sqlite3.connect('works.sqlite')
+cursor = con.cursor()
+cursor.execute('drop table if exists works')
+cursor.execute('create table works ('
+               'ID INTEGER PRIMARY KEY AUTOINCREMENT,'
+               'salary INTEGER,'
+               'educationType TEXT,'
+               'jobTitle TEXT,'
+               'qualification TEXT,'
+               'gender TEXT,'
+               'dateModify TEXT,'
+               'skills TEXT,'
+               'otherInfo TEXT)')
+con.commit()
+
+df = pd.read_csv("works.csv")
+df['skills'] = df['skills'].apply(remove_tags)
+df['otherInfo'] = df['otherInfo'].apply(remove_tags)
+df.to_sql("works", con, if_exists='append', index=False)
+con.commit()
+
+cursor.execute('drop table if exists genders')
+cursor.execute('create table genders(id INTEGER PRIMARY KEY AUTOINCREMENT, gender_val TEXT)')
+con.commit()
+cursor.execute('INSERT INTO genders(gender_val) SELECT DISTINCT gender FROM works WHERE gender IS NOT NULL')
+con.commit()
+cursor.execute('ALTER TABLE works ADD COLUMN gender_id INTEGER REFERENCES genders(id)')
+con.commit()
+cursor.execute('UPDATE works SET gender_id = (SELECT id FROM genders WHERE gender_val = works.gender)')
+con.commit()
+cursor.execute('ALTER TABLE works DROP COLUMN gender')
+con.commit()
+
+cursor.execute('SELECT * FROM genders')
+print(cursor.fetchall())
+cursor.execute('SELECT gender_val FROM genders,works WHERE genders.id = works.gender_id')
+print(cursor.fetchall())
+
+
+cursor.execute('drop table if exists education')
+cursor.execute('create table education(id INTEGER PRIMARY KEY AUTOINCREMENT, edu_val TEXT)')
+con.commit()
+cursor.execute('INSERT INTO education(edu_val) SELECT DISTINCT educationType FROM works WHERE educationType IS NOT NULL')
+con.commit()
+cursor.execute('ALTER TABLE works ADD COLUMN educationType_id INTEGER REFERENCES education(id)')
+con.commit()
+cursor.execute('UPDATE works SET educationType_id = (SELECT id FROM education WHERE edu_val = works.educationType)')
+con.commit()
+cursor.execute('ALTER TABLE works DROP COLUMN educationType')
+con.commit()
+
+cursor.execute('SELECT * FROM education')
+print(cursor.fetchall())
+cursor.execute('SELECT edu_val FROM education,works WHERE education.id = works.educationType_id')
+print(cursor.fetchall())