Sorry matthias, did not see that you already committed something and did overwrite you.

Added your version to it instead of mine and pushed again (since it was already overwritten by me).

freqtrade/commands/strategy_utils_commands.py

@@ -20,12 +20,9 @@ def start_strategy_update(args: Dict[str, Any]) -> None:
     :return: None
     """
 
-    if sys.version_info <= (3, 8):
+    if sys.version_info == (3, 8):  # pragma: no cover
-        print("This code requires Python 3.9 or higher. "
+        sys.exit("Freqtrade strategy updater requires Python version >= 3.9")
-              "We cannot continue. "
-              "Please upgrade your python version to use this command.")
 
-    else:
     config = setup_utils_configuration(args, RunMode.UTIL_NO_EXCHANGE)
 
     strategy_objs = StrategyResolver.search_all_objects(

tests/test_strategy_updater.py

@@ -2,16 +2,18 @@
 
 import sys
 
+import pytest
+
 from freqtrade.strategy.strategyupdater import StrategyUpdater
 
 
 def test_strategy_updater(default_conf, caplog) -> None:
-    if sys.version_info <= (3, 8):
+    if sys.version_info < (3, 9):
-        print("skipped tests since python version is 3.8 or lower.")
+        pytest.skip("StrategyUpdater is not compatible with Python 3.8", allow_module_level=True)
-    else:
+
     instance_strategy_updater = StrategyUpdater()
     modified_code1 = instance_strategy_updater.update_code("""
-    class testClass(IStrategy):
+class testClass(IStrategy):
     def populate_buy_trend():
         pass
     def populate_sell_trend():
@@ -22,62 +24,62 @@ def test_strategy_updater(default_conf, caplog) -> None:
         pass
     def custom_sell():
         pass
-    """)
+""")
     modified_code2 = instance_strategy_updater.update_code("""
-    ticker_interval = '15m'
+ticker_interval = '15m'
-    buy_some_parameter = IntParameter(space='buy')
+buy_some_parameter = IntParameter(space='buy')
-    sell_some_parameter = IntParameter(space='sell')
+sell_some_parameter = IntParameter(space='sell')
-    """)
+""")
     modified_code3 = instance_strategy_updater.update_code("""
-    use_sell_signal = True
+use_sell_signal = True
-    sell_profit_only = True
+sell_profit_only = True
-    sell_profit_offset = True
+sell_profit_offset = True
-    ignore_roi_if_buy_signal = True
+ignore_roi_if_buy_signal = True
-    forcebuy_enable = True
+forcebuy_enable = True
-    """)
+""")
     modified_code4 = instance_strategy_updater.update_code("""
-    dataframe.loc[reduce(lambda x, y: x & y, conditions), ["buy", "buy_tag"]] = (1, "buy_signal_1")
+dataframe.loc[reduce(lambda x, y: x & y, conditions), ["buy", "buy_tag"]] = (1, "buy_signal_1")
-    dataframe.loc[reduce(lambda x, y: x & y, conditions), 'sell'] = 1
+dataframe.loc[reduce(lambda x, y: x & y, conditions), 'sell'] = 1
-    """)
+""")
     modified_code5 = instance_strategy_updater.update_code("""
-    def confirm_trade_exit(sell_reason: str):
+def confirm_trade_exit(sell_reason: str):
     pass
     """)
     modified_code6 = instance_strategy_updater.update_code("""
-    order_time_in_force = {
+order_time_in_force = {
     'buy': 'gtc',
     'sell': 'ioc'
-    }
+}
-    order_types = {
+order_types = {
     'buy': 'limit',
     'sell': 'market',
     'stoploss': 'market',
     'stoploss_on_exchange': False
-    }
+}
-    unfilledtimeout = {
+unfilledtimeout = {
     'buy': 1,
     'sell': 2
-    }
+}
-    """)
+""")
 
     modified_code7 = instance_strategy_updater.update_code("""
-    def confirm_trade_exit(sell_reason):
+def confirm_trade_exit(sell_reason):
     if (sell_reason == 'stop_loss'):
         pass
-    """)
+""")
     modified_code8 = instance_strategy_updater.update_code("""
-    sell_reason == 'sell_signal'
+sell_reason == 'sell_signal'
-    sell_reason == 'force_sell'
+sell_reason == 'force_sell'
-    sell_reason == 'emergency_sell'
+sell_reason == 'emergency_sell'
-    """)
+""")
     modified_code9 = instance_strategy_updater.update_code("""
-    # This is the 1st comment
+# This is the 1st comment
-    import talib.abstract as ta
+import talib.abstract as ta
-    # This is the 2nd comment
+# This is the 2nd comment
-    import freqtrade.vendor.qtpylib.indicators as qtpylib
+import freqtrade.vendor.qtpylib.indicators as qtpylib
 
 
-    class someStrategy(IStrategy):
+class someStrategy(IStrategy):
     # This is the 3rd comment
     # This attribute will be overridden if the config file contains "minimal_roi"
     minimal_roi = {
@@ -86,7 +88,7 @@ def test_strategy_updater(default_conf, caplog) -> None:
 
     # This is the 4th comment
     stoploss = -0.1
-    """)
+""")
     # currently still missing:
     # Webhook terminology, Telegram notification settings, Strategy/Config settings