n = 23
r = True
while r:
guess= int(input('Enter an integer: '))
if guess == n:
print('yes')
r = False
elif guess < n:
print('no')
else:
print('no1')
else:
print('done')
print('yes done')
import os
import time
source = '/home/akash/funny3'
target = '/home/akash/funny3zip'
if not os.path.exists(target):
os.mkdir(target)
today = target + os.sep + time.strftime('%Y%m%d')
now = time.strftime('%H%M%S')
target = today+os.sep+now+'.zip'
if not os.path.exists(today):
os.mkdir(today)
print('created today')
zip_command = "zip -r {0} {1}".format(target, ' '.join(source))
# Run the backup
print ("Zip command is:")
print(zip_command)
print("Running:")
if os.system(zip_command) == 0:
print('Successful backup to', target)
else:
print('Backup FAILED')
created today Zip command is: zip -r /home/akash/funny3zip/20200624/145038.zip / h o m e / a k a s h / f u n n y 3 Running: Backup FAILED
class Robot:
# a class variable
population = 0
def __init__(self, name):
# initialized the data
self.name = name
print("(Initializing {})".format(self.name))
Robot.population += 1
def die(self):
# Dying
print("{} is being destroyed".format(self.name))
Robot.population -= 1
if Robot.population == 0:
print("{} was the last one".format(self.name))
else:
print("There are still {:d} robots working".format(Robot.population))
def say_hi(self):
# greeting
print("Greetings, i am".format(self.name))
@classmethod
def how_many(cls):
## prints current population
print(" we have {:d} robots. ". format(cls.population))
droid1 = Robot("R2")
droid1.say_hi()
Robot.how_many()
droid2 = Robot("R3")
droid2.say_hi()
Robot.how_many()
print("they can work now")
print("destroyinnng...")
droid1.die()
droid2.die()
Robot.how_many()
(Initializing R2) Greetings, i am we have 1 robots. (Initializing R3) Greetings, i am we have 2 robots. they can work now destroyinnng... R2 is being destroyed There are still 1 robots working R3 is being destroyed R3 was the last one we have 0 robots.
class SchoolMember:
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):
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):
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('A', 40, 20000)
s = Student('me', 25, 75)
m = [t, s]
for members in m:
members.tell()
Initialized SchoolMember: A) Initialized Teacher: A) Initialized SchoolMember: me) Initialized Student: me) Name:"A" Age:"40" Salary: "20000" Name:"me" Age:"25" Marks: "75"
try:
text = input("enter-->")
except EOFError:
print('why eof')
else:
print("you entered {}".format(text))
enter-->sd you entered sd
import sys
import time
f = None
try:
f = open("poem.txt") # Our usual file-reading idiom
while True:
line = f.readline()
if len(line) == 0:
break
print line, sys.stdout.flush()
print "Press ctrl+c now" # To make sure it runs for a while
time.sleep(2)
except IOError:
print "Could not find file poem.txt"
except KeyboardInterrupt:
print "!! You cancelled the reading from the file."
finally:
if f: f.close()
print "(Cleaning up: Closed the file)"
with open('file.txt') as w:
for line in w:
print(line)
## sys module - system specific
# print(sys.argv)
sys.version_info
sys.version_info(major=3, minor=7, micro=3, releaselevel='final', serial=0)
## Loggin module
import os, platform, logging
if platform.platform().startswith('Windows'):
logging_file = os.path.join(os.getenv('HOMEDRIVE'), os.getenv('HOMEPATH'), 'test.log')
else: logging_file = os.path.join(os.getenv('HOME'), 'test.log')
print "Logging to", logging_file
logging.basicConfig( level=logging.DEBUG, format='%(asctime)s : %(levelname)s : %(message)s', filename = logging_file, filemode = 'w', )
logging.debug("Start of the program")
logging.info("Doing something")
logging.warning("Dying now")
points = [ { 'x' : 2, 'y' : 3 }, { 'x' : 4, 'y' : 1 } ]
points.sort(key=lambda i : i['y'])
print(points)
[{'x': 4, 'y': 1}, {'x': 2, 'y': 3}]
listone = [2, 3, 4]
listtwo = [2*i for i in listone if i > 2]
listtwo
[6, 8]
mylist = ['item']
assert len(mylist) >= 1
mylist.pop()
'item'
assert len(mylist) >= 1
--------------------------------------------------------------------------- AssertionError Traceback (most recent call last) <ipython-input-54-927142ca25aa> in <module> ----> 1 assert len(mylist) >= 1 AssertionError:
from time import sleep
from functools import wraps
import logging
logging.basicConfig()
log = logging.getLogger("retry")
def retry(f):
@wraps(f)
def wrapped_f(*args, **kwargs):
MAX_ATTEMPTS = 5
for attempt in range(1, MAX_ATTEMPTS + 1):
try:
return f(*args, **kwargs)
except:
log.exception("Attempt %s/%s failed : %s", attempt, MAX_ATTEMPTS, (args, kwargs))
sleep(10 * attempt)
log.critical("All %s attempts failed : %s", MAX_ATTEMPTS, (args, kwargs))
return wrapped_f
counter = 0
@retry
def save_to_database(arg):
print "Write to a database or make a network call or etc."
print "This will be automatically retried if exception is thrown."
global counter
counter += 1 # This will throw an exception in the first call # And will work fine in the second call (i.e. a retry)
if counter < 2:
raise ValueError(arg)
if __name__ == '__main__':
save_to_database("Some bad value")
#!/usr/bin/python
import sys
# it's easy to print this list of course:
print(sys.argv)
# or it can be iterated via a for loop:
for i in range(len(sys.argv)):
if i == 0:
print("Function name: %s" % sys.argv[0])
else:
print("%d. argument: %s" % (i,sys.argv[i]))
## OUTPUT
$ python arguments.py arg1 arg2
['arguments.py', 'arg1', 'arg2']
Function name: arguments.py
1. argument: arg1
2. argument: arg2
$
## Packages:
os
platform
subprocess
shutils
glob
sys
import os
print(os.name)
posix
These names define the following operating systems:
posix Unix-like operating systems like Unix, Linux, BSD, Minix and others. nt Windows systems like "Windows 10", "Windows 8.1", "Windows 8", "Windows 7" and so on. java Java operating system.
## Other common commands:
print(os.getcwd())
os.chdir("") ## Changes to the path mentioned
print(os.getcwd())
print(os.listdir()) ## names of the files of directory