1 files changed, 45 insertions, 0 deletions
diff --git a/ftools.py b/ftools.py
new file mode 100644
index 00000000000..1bd9a30a404
--- /dev/null
+++ b/ftools.py
@@ -0,0 +1,45 @@
+import os
+import re
+import errno
+
+def write_file(path, data):
+    # In case data is None, return immediately
+    if data is None:
+        return
+    wdata = data.rstrip() + "\n"
+    with open(path, "w") as f:
+        f.write(wdata)
+
+def append_file(path, data):
+    # In case data is None, return immediately
+    if data is None:
+        return
+    wdata = data.rstrip() + "\n"
+    with open(path, "a") as f:
+            f.write(wdata)
+
+def read_file(path):
+    data = None
+    with open(path) as f:
+        data = f.read()
+    return data
+
+def remove_from_file(path, data):
+    # In case data is None, return immediately
+    if data is None:
+        return
+    try:
+        rdata = read_file(path)
+    except IOError as e:
+        # if file does not exit, just quit, otherwise raise an exception
+        if e.errno == errno.ENOENT:
+            return
+        else:
+            raise
+    lines = rdata.splitlines()
+    rmdata = data.strip().splitlines()
+    for l in rmdata:
+        for c in range(0, lines.count(l)):
+            i = lines.index(l)
+            del(lines[i])
+    write_file(path, "\n".join(lines))