Why is it defined

[alex-ge123]

Bug Description

Reproduction

How to write your own methods to handle data in custom components??????? I want to turn 'YYYY-MM-DD' 'HH:MM:SS' into a timestamp

Expected behavior

How to write your own methods to handle data in custom components??????? I want to turn 'YYYY-MM-DD' 'HH:MM:SS' into a timestamp

Who can help?

No response

Operating System

windows

Langflow Version

1.0.15

Python Version

3.11

Screenshot

No response

Flow File

No response

[dosubot[bot]]

To write your own methods to handle data in custom components and turn 'YYYY-MM-DD HH:MM:SS' into a timestamp, you can follow the structure provided in the Langflow documentation. Here is an example of how you can achieve this:

from langflow.custom import Component
from langflow.inputs import StrInput
from langflow.template import Output
from datetime import datetime

class TimestampComponent(Component):
    display_name = "Timestamp Converter"
    description = "Converts 'YYYY-MM-DD HH:MM:SS' format to a timestamp."

    inputs = [
        StrInput(
            name="datetime_string",
            display_name="Datetime String",
            info="Datetime in 'YYYY-MM-DD HH:MM:SS' format.",
        ),
    ]

    outputs = [
        Output(display_name="Timestamp", name="timestamp", method="convert_to_timestamp"),
    ]

    def convert_to_timestamp(self) -> int:
        datetime_string = self.datetime_string
        # Convert the datetime string to a timestamp
        dt = datetime.strptime(datetime_string, '%Y-%m-%d %H:%M:%S')
        timestamp = int(dt.timestamp())
        self.status = f"Converted {datetime_string} to {timestamp}"
        return timestamp

In this example:

• The TimestampComponent class inherits from Component.
• The inputs list defines a single StrInput for the datetime string.
• The outputs list defines a single Output that calls the convert_to_timestamp method.
• The convert_to_timestamp method converts the input datetime string to a timestamp using Python's datetime module and returns the timestamp ^[1].

Ensure that the method names and references are correctly defined and used within your component to avoid errors like "name 'getTimestamp' is not defined."

To continue talking to Dosu, mention @dosu.

[dmentx]

@alex-ge123 Did you try to build the backend again? With make install_backend.

[alex-ge123]

@alex-ge123 Did you try to build the backend again? With make install_backend.

no

[dmentx]

@alex-ge123 Did you try to build the backend again? With make install_backend.

no

Does it works now?

[alex-ge123]

@alex-ge123 Did you try to build the backend again? With make install_backend.

no

Does it works now?

from langflow.field_typing import Data

from langflow.custom import Component from langflow.io import MessageTextInput, Output from langflow.schema import Data from datetime import datetime import pytz

class TimestampComponent(Component): display_name = "Timestamp Converter" description = "Converts 'YYYY-MM-DD HH:MM:SS' format to a timestamp." documentation: str = "http://docs.langflow.org/components/custom" icon = "custom_components" name = "CustomComponent"

inputs = [
    MessageTextInput(name="input_value", display_name="Datetime String", value="Hello, World!",info="Datetime in 'YYYY-MM-DD HH:MM:SS' format."),
]

outputs = [
    Output(display_name="Output", name="output", method="build_output"),
]

def build_output(self) -> Data:
    # 转换为datetime对象
    datetime_obj = datetime.strptime(self.input_value, '%Y-%m-%d %H:%M:%S')

    # 设置时区
    tz = pytz.timezone('Asia/Shanghai')
    datetime_obj = tz.localize(datetime_obj)

    # 转换为时间戳，单位为毫秒
    timestamp = int(datetime_obj.timestamp() * 1000)

    data = Data(value=timestamp)
    self.status = data
    return data

    yes    it works now

[dmentx]

@alex-ge123 Did you try to build the backend again? With make install_backend.

no

Does it works now?

from langflow.field_typing import Data

from langflow.custom import Component from langflow.io import MessageTextInput, Output from langflow.schema import Data from datetime import datetime import pytz

class TimestampComponent(Component): display_name = "Timestamp Converter" description = "Converts 'YYYY-MM-DD HH:MM:SS' format to a timestamp." documentation: str = "http://docs.langflow.org/components/custom" icon = "custom_components" name = "CustomComponent"

inputs = [
    MessageTextInput(name="input_value", display_name="Datetime String", value="Hello, World!",info="Datetime in 'YYYY-MM-DD HH:MM:SS' format."),
]

outputs = [
    Output(display_name="Output", name="output", method="build_output"),
]

def build_output(self) -> Data:
    # 转换为datetime对象
    datetime_obj = datetime.strptime(self.input_value, '%Y-%m-%d %H:%M:%S')

    # 设置时区
    tz = pytz.timezone('Asia/Shanghai')
    datetime_obj = tz.localize(datetime_obj)

    # 转换为时间戳，单位为毫秒
    timestamp = int(datetime_obj.timestamp() * 1000)

    data = Data(value=timestamp)
    self.status = data
    return data

    yes    it works now

Then please, close your issue.

[alex-ge123]

@alex-ge123 Did you try to build the backend again? With make install_backend.

no

Does it works now?

from langflow.field_typing import Data

from langflow.custom import Component from langflow.io import MessageTextInput, Output from langflow.schema import Data from datetime import datetime import pytz class TimestampComponent(Component): display_name = "Timestamp Converter" description = "Converts 'YYYY-MM-DD HH:MM:SS' format to a timestamp." documentation: str = "http://docs.langflow.org/components/custom" icon = "custom_components" name = "CustomComponent"

inputs = [
    MessageTextInput(name="input_value", display_name="Datetime String", value="Hello, World!",info="Datetime in 'YYYY-MM-DD HH:MM:SS' format."),
]

outputs = [
    Output(display_name="Output", name="output", method="build_output"),
]

def build_output(self) -> Data:
    # 转换为datetime对象
    datetime_obj = datetime.strptime(self.input_value, '%Y-%m-%d %H:%M:%S')

    # 设置时区
    tz = pytz.timezone('Asia/Shanghai')
    datetime_obj = tz.localize(datetime_obj)

    # 转换为时间戳，单位为毫秒
    timestamp = int(datetime_obj.timestamp() * 1000)

    data = Data(value=timestamp)
    self.status = data
    return data

    yes    it works now

Then please, close your issue.

Of course you can, but I still have a place that I do not understand, custom components, why can not write a method alone, and then call your own method in other methods? Undefined methods always appear

[carlosrcoelho]

@alex-ge123

Do you need any assistance with this case? If not, please let us know if this issue can be closed.