diff --git a/build.py b/build.py
index 8b13789..9d57922 100644
--- a/build.py
+++ b/build.py
@@ -1 +1,10 @@
-
+import re
+def validate_email(s1):
+    if s1 == '':
+        raise ValueError
+    pattern = re.compile(r"[0-9a-zA-Z_+\.]+@[0-9a-zA-Z_+\.]+\.[0-9a-zA-Z_+\.]+")
+    if re.match(pattern,s1):
+        return True
+    else:
+        return False
+        
diff --git a/build.pyc b/build.pyc
new file mode 100644
index 0000000..ae2bbae
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diff --git a/tests/__init__.pyc b/tests/__init__.pyc
new file mode 100644
index 0000000..4f2de39
Binary files /dev/null and b/tests/__init__.pyc differ
diff --git a/tests/test_validate_email.pyc b/tests/test_validate_email.pyc
new file mode 100644
index 0000000..2de5b81
Binary files /dev/null and b/tests/test_validate_email.pyc differ