samples = ["expression123", "123expression", "exp123ression", "1235234567544", "100", "-1.0"]
filtered = [item for item in samples if not item.isdigit()]
print(filtered)
c2FtcGxlcyA9IFsiZXhwcmVzc2lvbjEyMyIsICIxMjNleHByZXNzaW9uIiwgImV4cDEyM3Jlc3Npb24iLCAiMTIzNTIzNDU2NzU0NCIsICIxMDAiLCAiLTEuMCJdCgpmaWx0ZXJlZCA9IFtpdGVtIGZvciBpdGVtIGluIHNhbXBsZXMgaWYgbm90IGl0ZW0uaXNkaWdpdCgpXQpwcmludChmaWx0ZXJlZCk=