'''

7.1 Variable argument functions

7.2 Anonymous functions and lambda

7.3 Returning function and closures

7.4 Function decorators

7.5 Static and class methods

'''

##7.1 Variable argument functions

###Positional variable arguments (*args)

###

def f(x,*args):

print('x ={%d}'%x)

for a in args:

print(a)

f(1,2,3,4,5)

### Keyword variable arguments (**kwargs)

###

def f2(x,**kwargs):

print('x ={%d}'%x)

for a in kwargs:

print(a)

f2(4,mode='fast',flag=False,hdr="what")

### Passing Tuples and Dicts

###

nums=(1,2,3,4)

nums2=(11,22,33,44)

f(0,nums,nums2)

d1 ={

'x':2,

'y':2.2,

'z':99

}

f(12,d1)

#average of nums

def avg(*args):

av = sum(args)/len(args)

print(f'average=%d'%av)

avg(1,2,3,4,5)

'''scratch code test 15 min code

read meslog.txt

'''

def read_meslog(filename):

sections=[]

print(filename)

sections = []

logs = []

with open(filename,'r+') as f:

hdr =f.readline()

hdr = hdr.split()

print(hdr)

print(hdr[0])

print(hdr[1])

print(hdr[2])

if hdr[0] != '.' and hdr[1] != '.'and hdr[2] != '.':

id,lno,nsecs=str(hdr[0]),int(hdr[1]),int(hdr[2])

#print(f'id=%s , sections=%d'%(id,secs))

i =0

while i < nsecs:

line =f.readline()

line = line.split()

xs =XSec(line[0],line[1],line[2],line[3])

print('\t',line)

sections.append(xs)

i +=1

lgs = XLog(hdr[0],sections)

logs.append(lgs)

return logs

## 2nd card; use a quick class

class XSec:

def __init__(self,z,x,y,d):

#instance data

self.z=z

self.x =x

self.y=y

self.d =d #dia

#special methods

def __str__(self):

return f'{self.z} {self.x} {self.y} {self.d} '

class XLog:

def __init__(self,lid,xs) -> None:

self.logId = lid

self.secs =xs

import os

import sys

data_dir = os.getcwd()

data_dir += r'\work\data'

mesfile_path= data_dir + r'\meslogs1.txt'

mesfile_path

xlogs = read_meslog(mesfile_path)

print("\n\n")

for lg in xlogs:

print(lg.logId)

for x in lg.secs:

print(x)

x1 = [1,3,4]

### 7.2 Anonymous Functions and Lambda

import queue

q1 =queue.Queue()

q1.put(11)

q1.put(12)

q1.put(13)

while( q1.qsize() !=0):

print(q1.get())

##

excdir = os.getcwd()

excdir += r'\work'

sys.path

sys.path.append(excdir)

from stock import Stock

slist = []

slist.append(Stock('DAA',22,1111))

slist.append(Stock('CAB',122,1211))

slist.append(Stock('CC',222,5353))

slist.append(Stock('AC',222,5353))

for s in slist:

print(s.name)

## sorting using lambda function

slist.sort(key=lambda a:a.name)

for s in slist:

print(s.name)

## dict + lambda function

mdict =[{'name': 'AA', 'price': 32.2, 'shares': 100},

{'name': 'IBM', 'price': 91.1, 'shares': 50},

{'name': 'CAT', 'price': 83.44, 'shares': 150},

{'name': 'MSFT', 'price': 51.23, 'shares': 200},

{'name': 'GE', 'price': 40.37, 'shares': 95},

{'name': 'MSFT', 'price': 65.1, 'shares': 50},

{'name': 'IBM', 'price': 70.44, 'shares': 100}]

mdict.sort(key=lambda a:a['name'])

mdict