My ~/.config/powerline/themes/powerline.json file

powerline.json

{
	"dividers": {
		"left": {
			"hard": " ",
			"soft": " "
		},
		"right": {
			"hard": " ",
			"soft": " "
		}
	},
	"spaces": 1,
	"segment_data": {
		"branch": {
			"before": " "
		},
		"cwd": {
			"args": {
				"ellipsis": "⋯"
			}
		},

		"line_current_symbol": {
			"contents": " "
		},
		"player": {
			"args": {
				"state_symbols": {
					"fallback": "♫",
					"play":     "▶",
					"pause":    "▮▮",
					"stop":     "■"
				}
			}
		},

		"time": {
			"before": "⌚ "
		},

		"powerline.segments.common.net.network_load": {
			"args": {
				"recv_format": "⬇ {value:>8}",
				"sent_format": "⬆ {value:>8}",
        "interface": "en3"
			}
		},
		"powerline.segments.common.net.hostname": {
			"before": " "
		},
		"powerline.segments.common.bat.battery": {
			"args": {
				"full_heart": "♥",
				"empty_heart": "♥",
				"online": "⚡︎",
				"offline": " "
			}
		},
		"powerline.segments.common.sys.uptime": {
			"before": "⇑  "
		},
		"powerline.segments.common.mail.email_imap_alert": {
			"before": "✉ "
		},
		"powerline.segments.common.env.virtualenv": {
			"before": "ⓔ  "
		},
		"powerline.segments.common.wthr.weather": {
			"args": {
				"icons": {
					"day":           "〇",
					"blustery":      "⚑",
					"rainy":         "☔",
					"cloudy":        "☁",
					"snowy":         "❅",
					"stormy":        "☈",
					"foggy":         "≡",
					"sunny":         "☼",
					"night":         "☾",
					"windy":         "☴",
					"not_available": "�",
					"unknown":       "⚠"
				},
        "location_query": "takatsuki, osaka"
			}
		},
		"powerline.segments.common.time.fuzzy_time": {
			"args": {
				"unicode_text": true
			}
		},

		"powerline.segments.vim.mode": {
			"args": {
				"override": {
					"n":  "NORMAL",
					"no": "N·OPER",
					"v":  "VISUAL",
					"V":  "V·LINE",
					"^V": "V·BLCK",
					"s":  "SELECT",
					"S":  "S·LINE",
					"^S": "S·BLCK",
					"i":  "INSERT",
					"R":  "RPLACE",
					"Rv": "V·RPLC",
					"c":  "COMMND",
					"cv": "VIM·EX",
					"ce": "NRM·EX",
					"r":  "PROMPT",
					"rm": "-MORE-",
					"r?": "CNFIRM",
					"!":  "!SHELL"
				}
			}
		},
		"powerline.segments.vim.visual_range": {
			"args": {
				"CTRL_V_text": "{rows} × {vcols}",
				"v_text_oneline": "C:{vcols}",
				"v_text_multiline": "L:{rows}",
				"V_text": "L:{rows}"
			}
		},
		"powerline.segments.vim.readonly_indicator": {
			"args": {
				"text": ""
			}
		},
		"powerline.segments.vim.modified_indicator": {
			"args": {
				"text": "+"
			}
    }
	}
}