diff --git a/README.md b/README.md
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+++ b/README.md
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+ Python 3
+Test exceptions
diff --git a/classexeption.py b/classexeption.py
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--- /dev/null
+++ b/classexeption.py
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+class MiError(Exception):
+    def __init__(self, valor):
+         self.valor = valor
+    def __str__(self):
+         return repr(self.valor)
+
+try:
+    raise MiError(2*2)
+except MyError as e:
+    print('Ocurrió mi excepción, valor:', e.encode('utf-8'))
diff --git a/classexeption2.py b/classexeption2.py
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+++ b/classexeption2.py
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+# define Python user-defined exceptions
+class Error(Exception):
+   """Base class for other exceptions"""
+   pass
+
+class ValueTooSmallError(Error):
+   """Raised when the input value is too small"""
+   pass
+
+class ValueTooLargeError(Error):
+   """Raised when the input value is too large"""
+   pass
+
+# our main program
+# user guesses a number until he/she gets it right
+
+# you need to guess this number
+number = 10
+
+while True:
+   try:
+       i_num = int(input("Enter a number: "))
+       if i_num < number:
+           raise ValueTooSmallError
+       elif i_num > number:
+           raise ValueTooLargeError
+       break
+   except ValueTooSmallError:
+       print("This value is too small, try again!")
+       print(" ")
+   except ValueTooLargeError:
+       print("This value is too large, try again!")
+       print(" ")
+
+print("Congratulations! You guessed it correctly.")
diff --git a/denominator.py b/denominator.py
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+++ b/denominator.py
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+while True:
+    # Read int from console.
+    denominator = int(input())
+
+    # Use int as denominator.
+    try:
+        i = 1 / denominator
+    except:
+        print("Error")
+    else:
+        print("OK")
diff --git a/divzero.py b/divzero.py
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+++ b/divzero.py
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+def mistake(name):
+    raise Exception(name+" caused exception")
+
+
+try:
+    x=1/0
+except ZeroDivisionError:
+    print ("Tryed div by zero")
+print ("salir")
+mistake("error de conexion")
diff --git a/openfile.py b/openfile.py
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--- /dev/null
+++ b/openfile.py
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+try:
+    f=open("abc")
+except:
+    print("except hit")
+    raise
diff --git a/raise.py b/raise.py
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index 0000000..1ad930d
--- /dev/null
+++ b/raise.py
@@ -0,0 +1 @@
+raise ZeroDivisionError