HTML：在start = datetime.date(2017, 12, 29)
end = datetime.date(2018, 12, 29)
import pandas_datareader.data as web
f = web.DataReader('GOOGL', 'iex', start, end)
f = f.head()
fig, ax1 = plt.subplots()
ax1.bar(x = f.index, height = f.volume/1000, width = 0.3)
ax1.set_ylabel('volumn in 1000s', color='b')
ax1.tick_params('y', colors='b')
ax2 = ax1.twinx()
ax2.plot(f.index, f.open, 'g')
ax2.set_ylabel('open price', color='g')
ax2.tick_params('y', colors='g')
fig.tight_layout()
plt.show()
行中，我不知道如何data-bind
<div id="map"></div>JavaScript：一切似乎还好吧？
<div>
<input data-bind="value: cityInput" type="text" class="search-input" id="city" placeholder="Enter a city"/>
<input data-bind="value: neighborhoodInput" type="text" class="search-input" id="neighborhood" placeholder="Enter a location in this city" value="Brooklyn"/>
<div data-bind="initMap()" id="map"></div>
</div>
<script async defer src="https://maps.googleapis.com/maps/api/js?libraries=geometry,places&v=weekly&key=APIKEY&callback=initMap"></script>
<script type="text/javascript" src="js/knockout-3.4.2.js"></script>
以某种方式，地图未按预期显示。它不是仅由于HTML中缺少 class ViewModel {
constructor() {
this.cityInput = ko.observable("New York");
this.neighborhoodInput = ko.observable("Brooklyn");
this.placeInput = ko.observable("Restaurants");
}
initMap() {
let geocoder = new google.maps.Geocoder();
geocoder.geocode({address: this.cityInput()}, function(results, status) {
if (status == google.maps.GeocoderStatus.OK) {
let cityLat = results[0].geometry.location.lat().valueOf();
let cityLng = results[0].geometry.location.lng().valueOf();
let map = new google.maps.Map(document.getElementById("map"), {
center: {lat: cityLat, lng: cityLng},
zoom: 10,
mapTypeControl: false
});
let cityOptions = {types: ["(cities)"]};
let cityAutocomplete = new google.maps.places.Autocomplete(document.getElementById("city"), cityOptions);
cityAutocomplete.bindTo("bounds", map);
let searchBox = new google.maps.places.SearchBox(document.getElementById("place"));
searchBox.setBounds(map.getBounds());
}
});
}
}
ko.applyBindings(new ViewModel());
而显示，还是Javascript中有任何错误？
答案 0 :(得分：0)
鉴于Map API的工作方式，我认为您无法使用Knockout的数据绑定对其进行初始化（如果我错了，任何人都可以纠正我）。
试试看-只需在viewModel的末尾调用initMap函数，然后从HTML中删除数据绑定。
<div id="map"></div>
-
class ViewModel {
constructor() {
...
}
initMap() {
...
}
initMap()
}