python basic

Author: AyemunHossain

Calculator [customize user input].py

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+
+def refomer(operator,x,y):
+	x=str(x)
+	y=str(y)
+
+	x=x.replace(" ","")
+	y=y.replace(" ","")
+	try:
+		x = int(x)
+		y = int(y)
+	except:
+		x = float(x)
+		y = float(y)
+	finally:
+		value = calculator(str(operator),x,y)
+
+	return x,y,value;
+
+def calculator(operator,x,y):
+    return {
+        '+': lambda : x+y,
+        '-': lambda : x-y,
+        '*': lambda : x*y,
+        '/': lambda : x/y,
+    }.get(operator,"Not Available")()
+
+
+strr=input("Enter the expresion <x+y>: ")
+op = ['+','-','*','/']
+count = 0
+for num in strr:
+	if num in op:
+		opee = num
+		count+=1
+	if count>1:
+		break;
+
+if count==1:
+	try:
+		x,y=strr.split(f'{opee}')
+	except:
+		print("Wrong Formated value: input <x+y> format")
+	else:
+		x,y,val= refomer(opee,x,y)
+		print(f"{x} {opee} {y} = {val}")
+

Capitalization.py

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+#Just simple capitalize
+name=["ashik"]
+Name=[name[0][0].upper()+name[0][1:]]
+Name=str(Name[0])
+print(Name)
+
+#user inputed data capitalize
+user_inputed_name="ayemun hossain"
+name_list=[word[0].upper()+word[1:] for word in user_inputed_name.split()]
+name=" ".join(name_list)
+print(name)
+
+#user inputed data capitalize : 2 <complex>
+user_inputed_name="AyEmun hosSaiN"
+name_list=[word[0].upper()+word[1:].lower() for word in user_inputed_name.split()]
+name=" ".join(name_list)
+print(name)

Demo.txt

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+I am Ashik. I read in Daffodil International University.

File Handeling part 1.py

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+#;==========================================
+#; Title:  File handeling part 1
+#; Author: @AyemunHossain
+#;==========================================
+
+
+#Read a file : 
+file = open("story.txt","r")
+containt=file.read()
+file.close()
+print(containt)
+
+#read file line by line : 
+file=open("story.txt","r")
+[print(i,end="") for i in file]
+file.close()
+
+#Read specific amount of bit :
+file = open("story.txt","r")
+content=file.read(10)
+file.close()
+print(content)
+
+#write a file : 
+file=open("story2.txt","w")
+file.write("This story is about the boy who live.\nHis name is Harry Potter.\n")
+file.close()
+
+#check out that file 
+file = open("story2.txt","r")
+content=file.read()
+file.close()
+print(content)
+
+#append a file 
+file=open("story2.txt","a+")
+file.write("The boy was cursed by \"Voldemort\".\n")
+file.close()
+file = open("story2.txt","r")
+content=file.read()
+file.close()
+print(content)
+
+#append a file and read:
+file=open("story2.txt","a+")
+file.write("\"Voldemort\" Killed Harry's parents.\n")
+file.seek(0)
+content=file.read()
+print(content)
+
+#Print the actual file name : 
+f=open("story2.txt",'r')
+print(f.name)
+f.close()

File Handeling part 2.py

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+#;==========================================
+#; Title:  File handeling part 2
+#; Author: @AyemunHossain
+#;==========================================
+
+
+#Iterate the file line by line
+
+f=open("story2.txt",'r')
+[print(i,end="") for i in f]
+f.close()
+
+
+#Read file and storing as list of lines 
+file = open("story2.txt","r")
+
+data_list = file.readlines()
+file.close()
+print(data_list)
+
+#mode function in file :
+file = open("story2.txt","r")
+
+if file.mode == 'r':
+	print("File is open as read mode")
+elif file.mode == 'w':
+	print("File is open as write mode")
+elif file.mode == 'a+':
+	print("Fil is open as append mode")
+
+
+#try case on file opening 
+
+try : 
+    f=open("secret_password.txt", "r")
+except:
+    print("File is not exist ")
+else : 
+    pass #further process will done here 
+finally:
+    print("__Done__")
+
+string_list = ["I","am","Ashik.","I","read","in","Daffodil","International","University.",]
+
+#Write a sequence to file : 
+f = open("demo.txt","w")
+f.writelines(' '.join(i for i in string_list))
+f.close()
+
+seq=['Hello\n','I am Ashik\n','I read in Daffodil International University\n','I live in Dhanmondi\n']
+f=open("info.txt",'w')
+f.writelines(seq)
+f.close()
+#check the file
+f=open("info.txt",'r')
+print(f.read())
+f.close()
+
+#Rename the file name: 
+import os
+os.rename("demo.txt","Demo.txt")
+
+#Delete the file:
+os.remove("Demo.txt")

Switch Case design.py

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+def switch(a):
+    switcher={
+        1:'Ashik',
+        2:'Malak',
+        3:'Ahiya',
+	4:'Amina',
+	5:'Rafik',
+	6:'Habib'
+        }
+    return switcher.get(a,"Not Found")
+
+
+print(switch(1)) #on you condition call the function with value

SystemRandom part 1.py

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+#;==========================================
+#; Title:  System Random Module
+#; Author: @AyemunHossain
+#;==========================================
+
+import random as r 
+#Cryptographically Secured Randmon Module
+
+sr=r.SystemRandom()
+sr.seed()
+
+#Now sr is the instance of SystemRandom And you can use any kind of methods 
+#That's works in random module and will be cryptographically secure 
+
+
+#Crypthographically Secure Random Float number: 
+randomFoat=sr.uniform(10,15)
+print(round(randomFoat,5))
+
+
+#Crypthographically Secure Random ascci <lower and upper>
+import string
+word = string.ascii_letters
+secure_word = "".join(sr.choices(word,k=5))
+print(secure_word)
+
+
+#Crypthographically Secure Random ascci letter and numbers:
+w_n = string.ascii_letters+string.digits
+secure_w_n = "".join(sr.choices(w_n,k=10))
+print(secure_w_n)
+
+#let's make uniqe that will be more secure:
+more_wn = string.ascii_letters+string.digits
+secure_more_wn = "".join(sr.sample(more_wn,k=25))
+print(secure_more_wn)
+
+#Even more strong combinaton with : 
+
+mixed = string.ascii_letters+string.digits+string.punctuation
+secure_mixed = "".join(sr.sample(mixed,k=30))
+print(secure_mixed)

SystemRandom part 2.py

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+#;==========================================
+#; Title:  System Random Module part 2
+#; Author: @AyemunHossain
+#;==========================================
+
+#Get more specific character if we want 
+
+import random as rn 
+sr = rn.SystemRandom()
+import string
+sr.seed()
+
+#Secure Random Lower Case Ascii Character
+lower_ascci = string.ascii_lowercase
+safe_lower = "".join(sr.sample(lower_ascci,k=5))
+print(safe_lower)
+
+#Secure Random Upper Case Ascii Character
+upper = string.ascii_uppercase
+safe_upper = "".join(sr.sample(upper,k=5))
+print(safe_upper)
+
+#Task : ONE 
+#->Generate a ten-character password with 
+	#one lowercase character
+	#one uppercase characteR
+	#one digits 
+	#one special character.
+
+rand_sor=string.ascii_letters+string.digits+string.punctuation
+passo=sr.choice(string.punctuation)
+passo+=sr.choice(string.ascii_letters)
+passo+=sr.choice(string.digits)
+passo+="".join(sr.sample(rand_sor,7))
+pass_list = list(passo)
+sr.shuffle(pass_list)
+print("".join(pass_list))

SystemRandom part 3.py

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+#;==========================================
+#; Title:  System Random Module part 3
+#; Author: @AyemunHossain
+#;==========================================
+import string
+
+#secrets modules to generate the cryptographically secured data
+import secrets
+sec_rand = secrets.SystemRandom()
+
+flt = sec_rand.uniform(0,10)
+print(round(flt,3))
+
+print(f"Random Number bellow 10 : {secrets.randbelow(10)}")
+
+#Secure unsigned integer with k random bits.
+print(f"Secure unsigned integer {secrets.randbits(k=10)}")
+
+
+#Generate a secure string with secret modules :
+print(f"Secure string -{secrets.token_bytes(32)}")
+
+print(f"Secure sting <hex format>: {secrets.token_hex(32)}")
+
+
+#Secret Choices:
+password = "".join(sec_rand.choices(string.ascii_letters+string.digits+string.digits,k=8))
+print(password)
+
+
+#Secure token for Passwords,OTP,session keys,Password changing,registration confirm,etc: 
+print(f"URL : https://adobil.com/user/ashik001/reset={secrets.token_urlsafe(96)}")

info.txt

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+Hello
+I am Ashik
+I read in Daffodil International University
+I live in Dhanmondi

story.txt

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+An old man lived in the village. He was one of the most unfortunate people in the world. The whole village
+was tired of him; he was always gloomy, he constantly complained and was always in a bad mood.
+
+The longer he lived, the more bile he was becoming and the more poisonous were his words. People avoided him,
+because his misfortune became contagious. It was even unnatural and insulting to be happy next to him.
+
+He created the feeling of unhappiness in others.
+
+But one day, when he turned eighty years old, an incredible thing happened. Instantly everyone started hearing the rumour:
+
+“An Old Man is happy today, he doesn’t complain about anything, smiles, and even his face is freshened up.”
+
+The whole village gathered together. The old man was asked:
+
+Villager: What happened to you?
+ 
+“Nothing special. Eighty years I’ve been chasing happiness, and it was useless. And then I decided to
+live without happiness and just enjoy life. That’s why I’m happy now.” – An Old Man
+
+Moral of the story:
+Don’t chase happiness. Enjoy your life.

story2.txt

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+This story is about the boy who live.
+His name is Harry Potter.
+The boy was cursed by "Voldemort".
+"Voldemort" Killed Harry's parents.