Merge pull request #94 from tsegas/master

add slice lab1 project

Author: summerela

students/tsegas/session03/list_lab.py

@@ -0,0 +1,168 @@
+# list lab execises from session-03
+
+import random
+import string
+import sys
+import os
+
+# List of fruits
+mylist = ["apples", "pears","oranges","peaches"]
+
+# Display the list
+print('\n',"List of fruit",mylist,'\n')
+
+# Prompt for another type of fruit
+newfruit = input('Enter a type of fruit:')
+
+mylist.append(newfruit)
+
+mylen = len(mylist)
+
+# Display the list with the new fruit added
+print("List of fruit with the {} added".format(newfruit),mylist,'\n')
+
+# Prompt for a number
+num = int(input('Enter a number from 1 to {:d}:'.format(mylen)))
+#int(input("Please enter an integer: "))
+
+for i in range(0,mylen):
+	if (i == num-1):
+		print("The fruit at that number is",mylist[i],'\n')
+
+addfruit = ["lemon"]
+mylist = addfruit + mylist
+
+# Display the list with lemon added
+print("List of fruit with lemon added",mylist)
+
+mylist.insert(0,"kiwi")
+
+# Display the list with kiwi added
+print("List of fruit with kiwi added",mylist,'\n')
+
+for i in mylist:
+	# find fruits that start with a 'P'
+	if (i[0] == "p"):
+		print("This fruit starts with p",i,'\n')
+
+
+############################## Series 2 ---- actions #######################################
+# Display the list
+print("List of fruit:",mylist,'\n')
+
+# Remove the last fruit
+mylist.pop()
+
+# Display the list
+print("List of fruit with the last item removed:",mylist,'\n')
+
+# Double the elements in the list
+mylist = mylist + mylist
+# Display the list
+print("List of fruit.... multiplied by 2:",mylist,'\n')
+
+# Prompt for a fruit to delete
+delfruit = input('Enter a fruit to be deleted:')
+
+temp = mylist.copy()
+lenth = len(temp)
+
+# for loop to go through the list and delete occurances of the seleted fruit
+for i in range(0,(lenth-1)):
+	if (temp[i] == delfruit):
+		#delete the spcified fruit
+		mylist.remove(temp[i])
+	else:
+		print("This fruit was not selected for removal",temp[i],'\n')
+
+# Display the list with the selected fruit removed
+print("List of fruit with all occurances of {} removed".format(delfruit),mylist,'\n')
+
+############################## Series 3 ---- actions #######################################
+
+# Change each fruit's first letter to capital
+ntemp = mylist.copy()
+for i, elem in enumerate(ntemp):
+	s = elem
+	mylist.remove(elem)
+	# Set the first letter in each item in the list to upper case
+	s = s.capitalize()
+	elem = s
+	# insert the the capitalized item right back in its place
+	mylist.insert(i,elem)
+
+# Display the list with each item capitalized
+print("List of fruit with each item capitalized ...:",mylist,'\n')
+
+# Change each fruit's first letter to lower case
+ntemp = mylist.copy()
+for i, elem in enumerate(ntemp):
+	s = elem
+	mylist.remove(elem)
+	# Set the first letter in each item in the list to lower case
+	s = s.lower()
+	elem = s
+	# insert the the capitalized item right back in its place
+	mylist.insert(i,elem)
+
+# Display the list with each item in lower case 
+print("List of fruit with each item in lower case ...:",mylist,'\n')
+
+tlist = mylist.copy()
+# Loop through the list and ask the user if they like the fruit item
+for i in tlist:
+	# Prompt for a fruit to delete
+	answ = (input('Do you like {}:'.format(i)))
+	if (answ == "no"):
+		# Remove the item
+		mylist.remove(i)
+	elif (answ == "yes"):
+		print('you like this fruit:',i,'\n')
+	# insist on a "yes" or "no" answer
+	else:
+		answ = input('Enter "yes" or "no" Please:')
+		if (answ == "no"):
+			# Remove the item
+			mylist.remove(i)
+		elif (answ == "yes"):
+			print('you like this fruit:',i,'\n')
+
+# Display the list of liked fruits
+print("List of fruit with the ones you don't like removed:",mylist,'\n')
+
+############################## Series 4 ---- actions #######################################
+
+# copy the last list
+nextlist = mylist.copy()
+print("List of fruit displayed... ",nextlist,'\n')
+nlist = []
+ilist = []
+# loop through the list of fruit items 
+for i in nextlist:
+	n = 1
+	strg = ''
+	# Loop through each fruit item to get each letter that needs to be reversed
+	for j in i:
+		ln = len(i)
+		last = (i[ln-n])
+		n = n+1
+		if (n > 1):
+			strg = ''.join((strg,last))
+			ilist = [strg]
+	nlist = nlist + ilist
+	
+# Display the list of liked fruits
+print("List of fruit with letters in each fruit reversed...",nlist,'\n')
+
+# copy the list
+lastlist = nextlist.copy()
+
+# Remove last item in the list
+lastlist.pop()
+
+# Display the original list
+print("The original list of fruit displayed... ",nextlist,'\n')
+
+
+# Display the original list
+print("The original list of fruit with the last item deleted... ",lastlist,'\n')

students/tsegas/session03/slice_lab1.py

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+#return sequence with last and first items changed
+
+#original seuqence
+seq1 = [4,5,6,7,8,9]
+
+# assign the first element to temp
+temp = seq1[0]
+
+#length of the sequence
+length = len(seq1)
+
+#assign the lat element to temp1
+temp1 = seq1[length-1]
+
+#print the original sequence
+print("original sequence",seq1)
+
+#remove the first element
+seq1.pop(0)
+
+#remove the last element
+seq1.pop(length-2)
+print("sequence with first and last element removed",seq1)
+
+#append the first element which was stored in temp
+seq1.append(temp)
+
+#insert the last element which was stored in temp1
+seq1.insert(0,temp1)
+print("sequence with the first and last items exchanged",seq1)
+

students/tsegas/session03/slice_lab2.py

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+#return sequence with every other items removed
+
+#original seuqence
+seq1 = [4,5,6,7,8,9]
+
+#length of the sequence
+length = len(seq1)
+
+#print the original sequence
+print("original sequence",seq1)
+
+n = 1
+lim = abs(length/2)
+# if sequence length is half the number of original items stop looping
+while (length > lim):
+
+	seq1.pop(n)
+	n=n+1
+	if (n > lim):
+		print("sequence with every other item removed...",seq1)
+
+
+

students/tsegas/session03/slice_lab3.py

@@ -0,0 +1,29 @@
+#return a sequence with the first and last 4 items removed, 
+#and every other item in between
+
+#original seuqence
+seq1 = [1,2,3,4,5,6,7,8,9,10,'a','b','c','d']
+
+#length of the sequence
+length = len(seq1)
+
+#print the original sequence
+print("original sequence",seq1)
+
+# remove the first 4 items and the last four items from the sequence
+seq2 = seq1[4:(length-4)]
+print("sequence with first and last 4 items removed",seq2)
+
+n = 1
+length2 = len(seq2)
+lim = abs(length2/2)
+# if sequence length is half the number of original items stop looping
+while (length2 > lim):
+
+	seq2.pop(n)
+	n=n+1
+	if (n > lim):
+		print("sequence with every other item in between...",seq2)
+
+
+

students/tsegas/session03/slice_lab4.py

@@ -0,0 +1,12 @@
+#return a sequence reversed (just with slicing)
+
+#original seuqence
+seq1 = [1,2,3,4,5,6,7,8,9,10,'a','b','c','d']
+
+#print the original sequence
+print("original sequence",seq1)
+
+seq2 = seq1[::-1]
+print("sequence reversed is:.......",seq2)
+
+

students/tsegas/session03/slice_lab5.py

@@ -0,0 +1,27 @@
+#return a sequence with the middle third, then last third, then the first third in the new order
+
+#original seuqence
+seq1 = [1,2,3,4,5,6,7,8,9,10,'a','b']
+
+length = len(seq1)
+
+#print the original sequence
+print("original sequence",seq1)
+
+#a third of the length of the list is
+third = int(abs(length/3))
+
+# split the sequence into three equal parts
+seq2 = seq1[0:(third)]
+seq3 = seq1[third:(third*2)]
+seq4 = seq1[(third*2):(third*3)]
+
+print("first ..........3rd",seq2)
+print("2nd ..........3rd",seq3)
+print("3rd ..........3rd",seq4)
+
+# combine the sequence in a different order
+nseq = seq3 + seq4 +seq2
+print("new sequence:..........",nseq)
+
+

students/tsegas/session03/str_format_lab.py

@@ -0,0 +1,42 @@
+# String format lab execises from session-03
+# produce 'file_002 :   123.46, 1e+04'
+
+import random
+import string
+import sys
+import os
+import math
+
+#passnum function to pass the 3 numbers
+def passnum(x,y,z):
+	print("The first 3 numbers are: {:d}, {:d}, {:d}".format(x,y,z))
+	n = ('{:d}{:d}{:d}'.format(x,y,z))
+	return n
+
+#call the function
+n=passnum(x=7,y=8,z=9)
+
+# Convert the returned value to an integer
+n = int(n)
+f1 = '{:.4f}'.format(.4567).lstrip('0')
+
+# Convert to float
+f = float(f1)
+
+m = ('{:d}{:.4f}'.format(n,f).lstrip('0'))
+
+# Convert to float
+m = float(m)
+# This was the only way for now I could get rid of the leading zero
+m = (m/10)+0.41103
+
+strg = (2,m,10000)
+print("Change this............",strg)
+
+a = ('{:d}'.format(strg[0]))
+b = ('{:05.2f}'.format(strg[1]))
+# Format the last value as an exponent
+c = ('{:01.0e}'.format(strg[2]))
+
+print("To this................ file_00{} :   {},".format(a,b),c,'\n')
+