dskjal

import bpy
from bpy.props import *

bl_info = {
    "name" : "My Properties",             
    "author" : "",                  
    "version" : (0,1),                  
    "blender" : (2, 77, 0),              
    "location" : "",  
    "description" : "",   

dskjal

import bpy

class MyButton(bpy.types.Operator):
  bl_idname = "my.button"
  bl_label = "text"
  
  def execute(self, context):
    print("pushed")
    return{'FINISHED'}
  

dskjal

import bpy

##############################################
class UI(bpy.types.Panel):
  bl_label = "my panel"
  bl_space_type = "VIEW_3D"
  bl_region_type = "UI"
  
  def draw(self, context):
    self.layout.operator("my.button")

dskjal

  bl_space_type = "VIEW_3D"
  bl_region_type = "TOOLS"
  bl_category = "Tools"

  bl_space_type = "VIEW_3D"
  bl_region_type = "TOOL_PROPS"

  bl_space_type = "VIEW_3D"
  bl_region_type = "UI"

dskjal

import bpy

class UI(bpy.types.Panel):
  bl_label = "my panel"
  bl_space_type = "VIEW_3D"
  bl_region_type = "UI"

####################################################################################################
  @classmethod
  def poll(self, context):

dskjal

import bpy

class UI(bpy.types.Panel):
  bl_label = "my panel"
  bl_space_type = "VIEW_3D"
  bl_region_type = "UI"
 
#############################################
  def draw(self, context):
    layout = self.layout

dskjal

def draw(self, context):
  layout = self.layout
  row = layout.row(align=False)
  row.alignment = 'LEFT'
  row.operator("my.button", text="1")
  row.operator("my.button", text="2")
  row.operator("my.button", text="3")

dskjal

def draw(self, context):
  layout = self.layout
  row = layout.row(align=False)
  box = row.box()
  box.operator("my.button", text="1")
  box.operator("my.button", text="2")
  box.operator("my.button", text="3")

dskjal

def draw(self, context):
  layout = self.layout
  layout.label("label", icon='TEXT')
  layout.operator("my.button", text="1")

dskjal

import bpy

class UI(bpy.types.Panel):
  bl_label = "my panel"
  bl_space_type = "VIEW_3D"
  bl_region_type = "UI"
  
  def draw(self, context):
    self.layout.operator("my.button")