Can't set default python checker with lsp mode about flycheck HOT 1 CLOSED

(use-package flycheck
  :ensure t)

(use-package lsp-mode
  :ensure t
  :commands (lsp lsp-deferred)
  :init (setq lsp-keymap-prefix "C-c l")
  :hook (((c++-mode c-mode python-mode css-mode html-mode js-mode) . lsp-deferred))
  :config
  (setq lsp-enable-snippet nil)
  (setq lsp-idle-delay 1.0)
  (setq lsp-diagnostics-engine :auto)
  (setq lsp-headerline-breadcrumb-enable nil)
  (setq lsp-diagnostics-severity-threshold '(error))
  (add-hook 'lsp-after-initialize-hook
            (lambda ()
              (when (derived-mode-p 'python-mode)
                (setq-local flycheck-checker 'python-pycompile)
                (setq-local flycheck-disabled-checkers '(lsp))
                (flycheck-mode)))))