Python 문법 한눈에 보기

Python 문법을 remind하기 위한 코드 (Anaconda)


# 추가해야 할 내용들 더 있음

import numpy as np
import matplotlib.pyplot as plt

#x - np.arange(0, 6, 0.1)
#y1 = np.sin(x)
#y2 = np.cos(x)

#plt.plot(x, y1, label="sin")
#plt.plot(x, y2, linestype="--", label="cos")
#plt.xlabel("x")
#plt.ylabel("y")
#plt.tilte('sin & cos')
#plt.legend()

x = np.arange(0, 10**5)
y = x / np.log(x)

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


class myclass:
    __num = 0                   # private 변수
    name = ''                   # class   변수
    def setname(self, n):
        self.name = n           # class변수를 사용하기 위해서는 이렇게
        name = n + n            # 이 name은 local 변수dla
    def count(self):
        myclass.__num += 1
    def val(self):
        return myclass.__num
    @classmethod
    def rest(self):
        myclass.__num = 0


class SchoolMember:
    '''Represents any school member.'''
    def __init__(self, name, age):
        self.name = name
        self.age = age
        print ('Initialized SchoolMember: {}'.format(self.name))
    def tell(self):
        '''Tell my details.'''
        print ('Name:"{}" Age:"{}"'.format(self.name, self.age))

class Teacher(SchoolMember):
    '''Represents a teacher.'''
    def __init__(self, name, age, salary):
        SchoolMember.__init__(self, name, age)
        self.salary = salary
        print ('Initialized Teacher: {}'.format(self.name))
    def tell(self):
        SchoolMember.tell(self)
        print ('Salary: "{:d}"'.format(self.salary))

class Student(SchoolMember):
    '''Represents a student.'''
    def __init__(self, name, age, marks):
        SchoolMember.__init__(self, name, age)
        self.marks = marks
        print ('Initialized Student: {}'.format(self.name))
    def tell(self):
        SchoolMember.tell(self)
        print ('Marks: "{:d}"'.format(self.marks))

t = Teacher('Mrs. Shrividya', 40, 30000)
s = Student('Swaroop', 25, 75)
# prints a blank line
print('')

members = [t, s]
for member in members:
    # Works for both Teachers and Students
    member.tell()

import pickle
f = open('member', 'wb')
pickle.dump(members, f)             # 여러자료를 순차적으로 dump한 후 순차적으로 load해서 사용 가능
fclose(f)


# import this

# { 'name' : 'John' }  dictionary
# { 1, 2, 3 }          Set                                     - & = intersection, | = union
# []                   list (indexable, sequential)
# ()                   tuple (static, indexable, sequential)
# string               string (static, indexable, sequential)  - in, x.find(), x.join(), x.startswith()

# a[-1] : 마지막 항목
# a[:-1] : 마지막 항목 이전까지
# a[:x] : index x 이전까지 (index는 0부터)

# a = b                ref를 copy (a는 b의 또다른 ref)
# a = b[:]             value를 copy

class myclass:
    __i = 0
    def func(self):
        pass


#exit()      # test end

import sys

if __name__ == '__main__':
    print('This program is being run by it self')
else:
    print('This program is being imported from another module')

print('\n\n\n')

print('The command line arguments are : ')
for i in sys.argv:
    print(i)
print('\n\nThe PYTHONPATH is ', sys.path, '\n')

def varargs(init = 5, *num, **key):
    '''
    This is docstring test
    looks good?
    very good
    '''
    print('init = ', init)
    print(num)
    print(key)

print(varargs.__doc__)

varargs()
varargs(1,'2',2,3,3,a=4,b=5,c=6)


print('\n\n\n')


number = 23

try:
    guess = int(input('Enter an integer : '))

    if guess == number:
        print('Right !!!')
    elif guess < number:
        print('It is little higer than that')
    else:
        print('It is little lower than that')
except:
    print('Something wrong !!!!!!!!!!')

print('Done')

for i in range(1, 5):
    print('in the loop', i)
    if(i == 3):
        break
else:
    print('out of the loop', i)
while i < 10:
    print('in the while', i)
    i += 1
else:
    print('out of the while', i)

def test_global():
    global number
    number = number + 1
    print('hello world')
    print('in function', number)

test_global()
print('out of function', number)