diff --git a/f4pga/flows/argparser.py b/f4pga/flows/argparser.py
index f7f97c7..8a15918 100644
--- a/f4pga/flows/argparser.py
+++ b/f4pga/flows/argparser.py
@@ -21,12 +21,12 @@ from argparse import ArgumentParser, Namespace
 from re import finditer as re_finditer
 
 
-def _add_flow_arg(parser: ArgumentParser):
+def p_add_flow_arg(parser: ArgumentParser):
     parser.add_argument("-f", "--flow", metavar="flow_path", type=str, help="Path to flow definition file")
 
 
-def _setup_build_parser(parser: ArgumentParser):
-    _add_flow_arg(parser)
+def p_setup_build_parser(parser: ArgumentParser):
+    p_add_flow_arg(parser)
 
     parser.add_argument(
         "-t", "--target", metavar="target_name", type=str, help="Perform stages necessary to acquire target"
@@ -51,7 +51,7 @@ def _setup_build_parser(parser: ArgumentParser):
     parser.add_argument("--val", "-V", action="append", default=[])
 
 
-def _setup_show_dep_parser(parser: ArgumentParser):
+def p_setup_show_dep_parser(parser: ArgumentParser):
     parser.add_argument(
         "-p", "--part", metavar="part_name", type=str, help="Name of the part (use to display part-specific values.)"
     )
@@ -64,7 +64,7 @@ def _setup_show_dep_parser(parser: ArgumentParser):
         help="Name of the stage (use if you want to set the value only for that stage). Requires `-p`.",
     )
 
-    _add_flow_arg(parser)
+    p_add_flow_arg(parser)
 
 
 def setup_argparser():
@@ -78,23 +78,23 @@ def setup_argparser():
     parser.add_argument("-s", "--silent", action="store_true")
 
     subparsers = parser.add_subparsers(dest="command")
-    _setup_build_parser(subparsers.add_parser("build"))
+    p_setup_build_parser(subparsers.add_parser("build"))
     show_dep = subparsers.add_parser("showd", description="Show the value(s) assigned to a dependency")
-    _setup_show_dep_parser(show_dep)
+    p_setup_show_dep_parser(show_dep)
 
     return parser
 
 
-def _parse_depval(depvalstr: str):
+def p_parse_depval(depvalstr: str):
     """
     Parse a dependency or value definition in form of:
     optional_stage_name.value_or_dependency_name=value
-    See `_parse_cli_value` for detail on how to pass different kinds of values.
+    See `p_parse_cli_value` for detail on how to pass different kinds of values.
     """
 
     d = {"name": None, "stage": None, "value": None}
 
-    splitted = list(_unescaped_separated("=", depvalstr))
+    splitted = list(p_unescaped_separated("=", depvalstr))
 
     if len(splitted) != 2:
         raise Exception("Too many components")
@@ -111,16 +111,12 @@ def _parse_depval(depvalstr: str):
     if len(path_components) > 0:
         raise Exception("Too many path components")
 
-    d["value"] = _parse_cli_value(valstr)
+    d["value"] = p_parse_cli_value(valstr)
 
     return d
 
 
-def _null_generator():
-    return (item for item in [])
-
-
-def _unescaped_matches(regexp: str, s: str, escape_chr="\\"):
+def p_unescaped_matches(regexp: str, s: str, escape_chr="\\"):
     """
     Find all occurences of a pattern in a string that contains escape sequences.
     Yields pairs of starting and ending indices of the pattern.
@@ -144,7 +140,7 @@ def _unescaped_matches(regexp: str, s: str, escape_chr="\\"):
         noescapes += noescape
 
     if len(offsets) == 0:
-        return _null_generator()
+        return (item for item in [])
 
     last_offset = offsets[-1]
     offsets.append(last_offset)
@@ -159,13 +155,13 @@ def _unescaped_matches(regexp: str, s: str, escape_chr="\\"):
         yield off1, off2
 
 
-def _unescaped_separated(regexp: str, s: str, escape_chr="\\"):
+def p_unescaped_separated(regexp: str, s: str, escape_chr="\\"):
     """
     Yields substrings of a string that contains escape sequences.
     """
 
     last_end = 0
-    for start, end in _unescaped_matches(regexp, s, escape_chr=escape_chr):
+    for start, end in p_unescaped_matches(regexp, s, escape_chr=escape_chr):
         yield s[last_end:start]
         last_end = end
     if last_end < len(s):
@@ -174,7 +170,7 @@ def _unescaped_separated(regexp: str, s: str, escape_chr="\\"):
         yield ""
 
 
-def _parse_cli_value(s: str):
+def p_parse_cli_value(s: str):
     """
     Parse a value/dependency passed to CLI
     CLI values are generated by the following non-contextual grammar:
@@ -207,7 +203,7 @@ def _parse_cli_value(s: str):
         inner = s[1 : (len(s) - 1)]
         if inner == "":
             return []
-        return [_parse_cli_value(v) for v in _unescaped_separated(",", inner)]
+        return [p_parse_cli_value(v) for v in p_unescaped_separated(",", inner)]
 
     # Dictionary
     if s[0] == "{":
@@ -217,14 +213,14 @@ def _parse_cli_value(s: str):
         inner = s[1 : (len(s) - 1)]
         if inner == "":
             return {}
-        for kv in _unescaped_separated(",", inner):
-            k_v = list(_unescaped_separated(":", kv))
+        for kv in p_unescaped_separated(",", inner):
+            k_v = list(p_unescaped_separated(":", kv))
             if len(k_v) < 2:
                 raise Exception("Missing value in dictionary entry")
             if len(k_v) > 2:
                 raise Exception("Unexpected ':' token")
             key = k_v[0]
-            value = _parse_cli_value(k_v[1])
+            value = p_parse_cli_value(k_v[1])
             d[key] = value
 
         return d
@@ -253,7 +249,7 @@ def get_cli_flow_config(args: Namespace, part: str):
     part_flow_config = create_defdict()
 
     def add_entries(arglist: "list[str]", dict_name: str):
-        for value_def in (_parse_depval(cliv) for cliv in arglist):
+        for value_def in (p_parse_depval(cliv) for cliv in arglist):
             stage = value_def["stage"]
             if stage is None:
                 part_flow_config[dict_name][value_def["name"]] = value_def["value"]