diff --git a/build.py b/build.py
index 8b13789..b188a60 100644
--- a/build.py
+++ b/build.py
@@ -1 +1,9 @@
-
+import re
+def validate_email(email_string):
+    pattern = re.compile(r"[0-9a-zA-Z_+\.]+@[0-9a-zA-Z_+\.]+\.[0-9a-zA-Z_+\.]+")
+    if re.match(pattern,email_string):
+        return True
+    if email_string == '':
+        raise ValueError
+    else:
+        return False
diff --git a/build.pyc b/build.pyc
new file mode 100644
index 0000000..38d0a72
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diff --git a/tests/__init__.pyc b/tests/__init__.pyc
new file mode 100644
index 0000000..9504a42
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diff --git a/tests/test_validate_email.pyc b/tests/test_validate_email.pyc
new file mode 100644
index 0000000..e9ed096
Binary files /dev/null and b/tests/test_validate_email.pyc differ