diff --git a/yufree123/.ex17.py.swp b/yufree123/.ex17.py.swp
new file mode 100644
index 0000000..e93a586
Binary files /dev/null and b/yufree123/.ex17.py.swp differ
diff --git a/yufree123/ex14.py b/yufree123/ex14.py
new file mode 100644
index 0000000..850e922
--- /dev/null
+++ b/yufree123/ex14.py
@@ -0,0 +1,21 @@
+from sys import argv
+
+script, user_name = argv
+prompt = '>'
+
+print "Hi %s, I'm the %s script."%(user_name,script)
+print "I'd like to ask you a few qustions."
+print "Do you like me %s?"%user_name
+likes=raw_input(prompt)
+
+print "Where doyou live %s"%user_name
+lives = raw_input(prompt)
+
+print "What kind of computer do you have?"
+computer = raw_input(prompt)
+
+print """
+Alright, so you said %r about liking me.
+You live in %r. Noy sure where that is.
+And you have a %r computer. Nice.
+"""%(likes, lives, computer)
diff --git a/yufree123/ex15.py b/yufree123/ex15.py
new file mode 100644
index 0000000..bf2a3c5
--- /dev/null
+++ b/yufree123/ex15.py
@@ -0,0 +1,14 @@
+from sys import argv
+script , filename = argv
+
+txt = open(filename)
+
+print "Here's your file %r:"%filename
+print txt.read()
+
+print "Type the filename again:"
+file_again =raw_input(">")
+
+txt_again = open(file_again)
+
+print txt_again.read()
diff --git a/yufree123/ex16.py b/yufree123/ex16.py
new file mode 100644
index 0000000..eb86785
--- /dev/null
+++ b/yufree123/ex16.py
@@ -0,0 +1,34 @@
+from sys import argv
+
+script, filename=argv
+
+print "We're going to erase %r." % filename
+print "If you don't want that, hit CTRL-C(^C)."
+print "If you do want that, hit RETURN."
+
+raw_input("?")
+
+print "Opening the file..."
+target=open(filename,'w')
+
+print "Truncating the file. Goodbye!"
+target.truncate()
+
+print "Now I'm going to ask you for three lines."
+
+line1= raw_input("line1:")
+line2= raw_input("line2:")
+line3= raw_input("line3:")
+
+print "I'm going to write these to the file."
+
+target.write(line1)
+target.write("\n")
+target.write(line2)
+target.write("\n")
+target.write(line3)
+target.write("\n")
+
+print "And finally,we close it."
+target.close()
+
diff --git a/yufree123/ex17.py b/yufree123/ex17.py
new file mode 100644
index 0000000..61dc45c
--- /dev/null
+++ b/yufree123/ex17.py
@@ -0,0 +1,25 @@
+from sys import argv                                                  
+from os.path import exists
+script ,from_file,to_file=argv
+print "Copying from %s to %s"%(from_file,to_file)
+
+	  
+#we could do these two on one line too, how?
+in_file= open(from_file)
+indata=in_file.read()
+
+print "Does the output file is %d bytes long" % len(indata)
+
+print "Does the output file exist?%r"% exists(to_file)
+print "Ready, hit RETURN to contiue, CTRL-C to about."
+raw_input()
+
+out_file = open(to_file,'w')
+out_file.write(indata)
+
+print "Alright, all done."
+ 
+out_file.close()
+
+
+
diff --git a/yufree123/ex17.py~ b/yufree123/ex17.py~
new file mode 100644
index 0000000..de5efd1
--- /dev/null
+++ b/yufree123/ex17.py~
@@ -0,0 +1,25 @@
+from sys import argv                                                  
+from os.path import exists
+script ,from_file,to_file=argv
+print "Copying from %s to %s"%(from_file,to_
+
+	  
+#we could do these two on one line too, how?
+in_file= open(from_file)
+indata=in_file.read()
+
+print "Does the output file is %d bytes long" % len(indata)
+
+print "Does the output file exist?%r"% exists(to_file)
+print "Ready, hit RETURN to contiue, CTRL-C to about."
+raw_input()
+
+out_file = open(to_file,'w')
+out_file.write(indata)
+
+print "Alright, all done."
+ 
+out_file.close()
+
+
+
diff --git a/yufree123/ex18.py b/yufree123/ex18.py
new file mode 100644
index 0000000..fa9497a
--- /dev/null
+++ b/yufree123/ex18.py
@@ -0,0 +1,22 @@
+#this one is like your script with argv
+def print_two(*args):
+    arg1,arg2=args
+    print "arg1:%r,arg2:%r"%(arg1,arg2)
+
+#ok,that *args is actually pointless,we can just do this
+def print_two_again(arg1,arg2):
+    print "arg1:%r,arg2:%r"%(arg1,arg2)
+
+#this just takes one argument
+def print_one(arg1):
+    print "arg1:%r"%arg1
+
+#this one takes no arguments
+def print_none():
+    print "I got nothin'."
+
+
+print_two("Zed","Shaw")
+print_two_again("Zed","Shaw")
+print_one("First!")
+print_none()
diff --git a/yufree123/ex19.py b/yufree123/ex19.py
new file mode 100644
index 0000000..e805e35
--- /dev/null
+++ b/yufree123/ex19.py
@@ -0,0 +1,23 @@
+def cheese_and_crackers(cheese_count,boxes_of_crackers):
+    print "You have %d cheese!"%cheese_count
+    print "You have %d boxes of crackers"%boxes_of_crackers
+    print "Man that's enough for a party!"
+    print "Get a blanket.\n"
+
+
+print "We can just give the function numbers directly:"
+cheese_and_crackers(20,30)
+
+
+print "OR,we can use variables from our script:"
+amount_of_cheese=10
+amount_of_crackers=50
+
+cheese_and_crackers(amount_of_cheese,amount_of_crackers)
+
+
+print "We can even do math inside too:"
+cheese_and_crackers(10+20,5+6)
+
+print "And we can combine the two, variables and math:"
+cheese_and_crackers(amount_of_cheese+100,amount_of_crackers+1000)
diff --git a/yufree123/ex20.py b/yufree123/ex20.py
new file mode 100644
index 0000000..cd1a113
--- /dev/null
+++ b/yufree123/ex20.py
@@ -0,0 +1,34 @@
+from sys import argv
+
+script ,input_file=argv
+
+def print_all(f):
+    print f.read()
+
+def rewind(f):
+    print f.seek(0)
+
+def print_a_line(line_count,f):
+    print line_count,f.readline()
+
+current_file=open(input_file)
+
+print "First let's print the whole file:\n"
+
+print_all(current_file)
+
+print "Now let's rewind, kind of like a tape."
+
+rewind(current_file)
+
+print "Let's print three lines:"
+
+current_line=1
+print_a_line(current_line,current_file)
+
+current_line=current_line+1
+print_a_line(current_line,current_file)
+
+current_line=current_line+1
+print_a_line(current_line,current_file)
+    
diff --git a/yufree123/ex21.py b/yufree123/ex21.py
new file mode 100644
index 0000000..6c196b4
--- /dev/null
+++ b/yufree123/ex21.py
@@ -0,0 +1,32 @@
+def add(a,b):
+    print "ADDING %d+%d"%(a,b)
+    return a+b
+
+def subtract(a,b):
+    print "SUBTRACTING %d-%d"%(a,b)
+    return a-b;
+
+def multiply(a,b):
+    print "MULTIPLYING %d*%d"%(a,b)
+    return a*b;
+
+def divide(a,b):
+    print "DIVIDING %d/%d"%(a,b)
+    return a/b
+
+
+print "Let's do some math with just functions!"
+
+age= add(30,5)
+height=subtract(78,4)
+weight=multiply(90,2)
+iq=divide(100,2)
+
+print "Age:%d,Height:%d,Weight:%d,IQ:%d"%(age,height,weight,iq)
+
+#A puzzle for the extra credit,type it in anyway.
+print "Here is a puzzle."
+
+what =add(age,subtract(height,multiply(weight,divide(iq,2))))
+
+print "That becomes:",what,"Can you do it by hand?"
diff --git a/yufree123/ex24.py b/yufree123/ex24.py
new file mode 100644
index 0000000..9ad510e
--- /dev/null
+++ b/yufree123/ex24.py
@@ -0,0 +1,36 @@
+print "Let's practice everything."
+print 'You\'d need to know \'bout escapes with \\ that do \n newlines and \t tabs.'
+poem ="""
+\tThe lovely world
+with logic so firmly planted
+cannot discern \n the needs of love
+nor comprehend passion from intuition
+and requires an explanation
+\n\t\twhere there is none.
+"""
+
+
+print "-------------"
+print poem
+print "-------------"
+
+five=10-2+3-6
+print "This should be five: %s"%five
+
+def secret_formula(started):
+    jelly_beans=started*50
+    jars=jelly_beans/1000
+    crates=jars/100
+    return jelly_beans,jars,crates
+
+start_point=10000
+beans,jars,crates=secret_formula(start_point)
+
+print "With a starting point of: %d"%start_point
+print "We'd have %d beans,%d jars, and %d crates."%(beans,jars,crates)
+
+
+start_point=start_point/10
+
+print "We can also do that this way:"
+print "We'd have %d beans,%d jars, and %d crates."%secret_formula(start_point)
diff --git a/yufree123/ex25.py b/yufree123/ex25.py
new file mode 100644
index 0000000..9e09392
--- /dev/null
+++ b/yufree123/ex25.py
@@ -0,0 +1,31 @@
+def break_words(stuff):
+    """This function will break up words for us."""
+    words=stuff.split(' ')
+    return words
+def sort_words(words):
+    """Sorts the words."""
+    return sorted(words)
+def print_first_word(words):
+    """Prints the first word after popping it off."""
+    word=words.pop(0)
+    print word
+
+def print_last_word(words):
+    """Prints the last word after popping it off."""
+    word=words.pop(-1)
+    print word
+
+def sort_sentence(sentence):
+    """Take in a full sentence and returns the sorted words."""
+    words=break_words(sentence)
+    return sort_words(words)
+def print_first_and_last(sentence):
+    """Prints the first and last words of the sentence."""
+    words=break_words(sentence)
+    print_first_word(words)
+    print_last_word(words)
+def print_first_and_last_sentence(sentence):
+    """Sorts the words then prints the first and last one."""
+    words=sort_sentence(sentence)
+    print_first_word(words)
+    print_last_word(words)
diff --git a/yufree123/ex29.py b/yufree123/ex29.py
new file mode 100644
index 0000000..5e823aa
--- /dev/null
+++ b/yufree123/ex29.py
@@ -0,0 +1,21 @@
+people=20
+cats=30
+dogs=15
+
+if people<cats:
+   print "Too many cats!The world is doomed!"
+if people>cats:
+   print "Not many cats! The world is saved!"
+if people<dogs:
+   print "The world is drooled on!"
+if people>dogs:
+   print "The world is dry!"
+dogs+=5
+if people>=dogs:
+    print "People are greater than or equal to dogs."
+if people<=dogs:
+   print "People are less than or equal to dogs."
+
+if people==dogs:
+    print "People are dogs."
+    
diff --git a/yufree123/ex30.py b/yufree123/ex30.py
new file mode 100644
index 0000000..991b301
--- /dev/null
+++ b/yufree123/ex30.py
@@ -0,0 +1,25 @@
+people = 30
+cars = 40
+buses = 15
+
+
+if cars>people:
+   print "We should take the cars."
+elif cars < people:
+     print "We should not take the cars."
+else:
+     print "We can't decide."
+
+if buses > cars:
+   print "That's too many buses."
+elif buses<cars:
+     print "Maybe we could take the buses."
+else:
+    print "We still can't decide."
+
+if people > buses:
+   print "Alright, let's just take the buses."
+else:
+    print "Fine,let's stay home then."
+
+    
diff --git a/yufree123/ex31.py b/yufree123/ex31.py
new file mode 100644
index 0000000..d5dc58c
--- /dev/null
+++ b/yufree123/ex31.py
@@ -0,0 +1,32 @@
+print "Your enter a dark room with two doors. Do you go thriugh door #1 or door#2?"
+
+door = raw_input(">")
+
+if door == "1":
+    print "There's a giant bear here eating a cheese cake. What do you do?"
+    print "1. Take the cake."
+    print "2. Scream at the bear."
+
+    bear = raw_input(">")
+
+    if bear=="1":
+        print "The bear eats your face off. Good job!"
+    elif bear=="2":
+        print "The bear eats your legs off. Good job!"
+    else:
+        print "Well, doing %s is probably better. Good job."
+
+elif door =="2":
+    print "You stare into the endless abyes at Cthulhu's retia."
+    print "1. Blueberries."
+    print "2. Yellow jacket clothespins."
+    print "3. Understanding revolvers yelling melodies."
+
+    insanity= raw_input(">")
+
+    if insanity=="1"or insanity=="2":
+        print "Yoour body survives powered by a mind of jello. Good job!"
+    else:
+        print "The insanity rots your eyes into a pool of muck. Good job!"
+else:
+    print "You stumble around and fall on a knife and die. Good job!"
diff --git a/yufree123/ex32.py b/yufree123/ex32.py
new file mode 100644
index 0000000..8c2fcde
--- /dev/null
+++ b/yufree123/ex32.py
@@ -0,0 +1,27 @@
+the_count= [1,2,3,4,5]
+fruits=['apples','oranges','pears','apricots']
+change=[1,'pennies',2,'dimes',3,'quarters']
+
+# this first kind of for-loop goes through a list
+for number in the_count:
+    print "This is count %d"%number
+
+# same as above
+for fruit in fruits:
+    print "A fruit of type:%s"%fruit
+
+#also we can go throuth mixed lists too
+# notice we have to use %r since we don't know what's in it
+for i in change:
+    print "I got %r "%i
+#We can also build lists,ffirst starts with  an empty one
+elements=[]
+
+#then use the range function to do 0 to 5 counts
+for i in range(0,6):
+    print "Adding %d to the list."%i
+    #append is a function that lists understanding
+    elements.append(i)
+#now we can print them out too
+for i in elements:
+    print "Elements was: %d"%i
diff --git a/yufree123/ex33.py b/yufree123/ex33.py
new file mode 100644
index 0000000..e542472
--- /dev/null
+++ b/yufree123/ex33.py
@@ -0,0 +1,11 @@
+i=0
+numbers=[]
+while i<6:
+    print "At the top i is %d"%i
+    numbers.append(i)
+    i=i+1
+    print "Number now:",numbers
+    print "At the bottom i is %d"%i
+print "The numbers"
+for num in numbers:
+    print num
diff --git a/yufree123/ex35.py b/yufree123/ex35.py
new file mode 100644
index 0000000..aae5254
--- /dev/null
+++ b/yufree123/ex35.py
@@ -0,0 +1,76 @@
+from sys import exit 
+
+def gold_room():
+    print "This room is full of gold. How much do you take?"
+
+    next = raw_input("> ")
+    if"0"in next or "1" in next:
+        how_much=int(next)
+    else:
+        dead("Man,Learn to type a number.")
+    
+    if how_much<50:
+       print "Nice, you're not greedy, you win."
+       exit(0)
+    else:
+       dead("You greedy baastard!")
+def bear_room():
+    print "There is a bear here."
+    print "The bear has a bunch of honey."
+    print "The fat bear is in front of another door."
+    print "How are you going to move the bear?"
+    bear_moved=False
+
+    while True:
+        next= raw_input("> ")
+        
+	if next=="take honey":
+           dead("The bear looks at you then slaps your face off.")
+	elif next=="taunt bear"and not bear_moved:
+	    print "The bear has moved from the door. You can go throuth it now."
+	    bear_moved=True
+        elif next=="tanunt bear"and not bear_moved:
+	        dead("The bear gets pissed off and chews your leg off.")
+        elif next=="open door"and bear_moved:
+	      gold_room()
+	else:
+	     print "I got no idea what that mean."
+
+
+def cthulhu_room():
+    print "Here you see the great ebil Cthulhu."
+    print "He,it,whatever stares at you and you go insane."
+    print "Do you flee for your life or eat your head?"
+
+    next= raw_input("> ")
+
+    if "flee"in next:
+        start()
+    elif"head"in next:
+        dead("Well that was tasty!")
+    else:
+        cthulhu_room()
+    
+
+def dead(why):
+    print why,"Good job!"
+    exit(0)
+
+def start():
+    print "You are in a dark room."
+    print "There is a door to your right and left."
+    print "Which one do you take?"
+ 
+    next=raw_input("> ")
+
+    if next=="left":
+       bear_room()
+    elif next=="right":
+        cthulhu_room()
+    else :
+        dead("You stumble around the room until you atarve.")
+
+start()
+
+
+
diff --git a/yufree123/ex38.py b/yufree123/ex38.py
new file mode 100644
index 0000000..a1439da
--- /dev/null
+++ b/yufree123/ex38.py
@@ -0,0 +1,21 @@
+ten_things="Apples Oranges Crows Telephone Light Suger"
+
+print "Wait there's not 10 things inthat list, lte's fix that."
+
+stuff=ten_things.split(' ')
+more_stuff=["Day","Nignt","Song","Frisbee","Corn","Banana","Girl","Boy"]
+
+while len(stuff)!=10:
+      next_one=more_stuff.pop()
+      print "Adding:",next_one
+      stuff.append(next_one)
+      print "There's %d items now."%len(stuff)
+print "There we go:",stuff
+
+print "Let's do some things with stuff."
+
+print stuff
+print stuff[-1]#whoa!fancy
+print stuff.pop()
+print ' '.join(stuff)#what?cool!
+print "#".join(stuff[3:5])#super stellar!
diff --git a/yufree123/test.txt~ b/yufree123/test.txt~
new file mode 100644
index 0000000..e69de29
diff --git "a/yufree123/\346\227\240\346\240\207\351\242\230\346\226\207\346\241\243~" "b/yufree123/\346\227\240\346\240\207\351\242\230\346\226\207\346\241\243~"
new file mode 100644
index 0000000..e69de29